Android Code Snippet Register User example using OkHttpUtils2

aeric · Mar 27, 2015

Register User example using OkHttpUtils2

Updates:
This project is deprecated. Please check User Login + MySQL PHP API https://www.b4x.com/android/forum/threads/user-login-mysql-php-api.117826/

Introduction
This code snippet is based on the thread posted by KMatle in Tutorials & Examples. You can modify the layout and add in to your apps so that registered members can use your app by logging in using their user id and password.

How it works
This app starts by checking for connection by sending a request to the server and wait for a reply. The PHP script in the server will process the request and send back a JSON string. The screen will show "Connection success" if it is getting a response from the server.

Tap on the 'Register' button and the app will open up a new activity where information such as user id, password and email are required for the registration process. The data submitted will be stored in a MySQL database. An email will be sent to the user. If the user id or email is already registered before, a message will show "The user id '[YourUserID]' or email ([YourEmail]) is already in use". Open the email and click on the link to finish the registration process.

After successful register, you can press the 'Login' button to open up the Login activity. If you try to log in without activating your account at the first place, the app will show a message "Account is not activated!". Key in your user id and password and tap on the 'Login' button. If user id and password are incorrect, the app will show a message "Wrong User ID or Password!". If log in success, the app will show a message "Welcome, [YourFullName]" in a new activity showing a list of registered members in a listview.

This code snippet demonstrates of the usage of :
1. HttpUtils2 to connect to MySQL database located in a free hosting provider (using PHP web services and JSONParser)
2. Multiple Activity and Layout
3. SQL commands to Insert and Update records in MySQL database tables
4. Regular expression to check the email format
5. PHP Mail() function to send mail to the new member for activation and notify the administrator.
6. ListView for populating records stored in MySQL database table

Note that you can add more functions such as password hashing, retrieve forgotten password and using Captcha verification.

Version 1.1 (Update 07 July 2015)
- Rename a field in database table tbl_member from "status" to "reg_status"
- Added "(Online)" beside user name in listview
- Added a Log out button and signout.php
- Fixed signin.php showing 'null' user name

Version 1.2 (Update 10 Mar 2016)
- Retrieve Password
- Reset Password

Reupload PHP files (Update 19 Apr 2016)
Due to many confusion of register.php in a line of code somewhere in signup.php script, I have reuploaded PHP.zip in attachment. Sorry for the inconvenience.

Version 1.3 (Update 08 Feb 2019)
- Set targetSdkVersion=26
- Replaced HttpUtils2 with OkHttpUtils2
- Changed conflicting Job names with module names
- Added Change Password activity
- Removed Forgot Password activity
- Replaced MySQL functions in PHP script with MySQLi functions
- Added db.php in PHP script to store global variables

B4A Codes

B4X:

#Region  Project Attributes
    #ApplicationLabel: Demo
    #VersionCode: 4
    #VersionName: 1.3
    'SupportedOrientations possible values: unspecified, landscape or portrait.
    #SupportedOrientations: portrait
    #CanInstallToExternalStorage: False
#End Region

#Region  Activity Attributes
    #FullScreen: False
    #IncludeTitle: False
#End Region

Sub Process_Globals
    Dim strURL As String = "http://demo.computerise.my/b4a/register-user-php/"    ' Remote / Production
    'Dim strURL As String = "http://192.168.43.191:8000/register-user-php/"        ' Local / Development
End Sub

Sub Globals
    Private Panel1 As Panel
    Private lblTitle As Label
    Private lblVersion As Label
    Private btnLogin As Button
    Private btnRegister As Button
End Sub

Sub Activity_Create(FirstTime As Boolean)
    Activity.LoadLayout("frmStart")
    lblVersion.Text = "v 1.3"
    TestConnection
End Sub

Sub Activity_Resume

End Sub

Sub Activity_Pause (UserClosed As Boolean)

End Sub

Sub Activity_KeyPress(KeyCode As Int) As Boolean
    Dim Answ As Int
    Dim Txt As String

    If KeyCode = KeyCodes.KEYCODE_BACK Then    ' Checks if the KeyCode is BackKey
        Txt = "Do you really want to quit the program ?"
        Answ = Msgbox2(Txt, "A T T E N T I O N", "Yes", "", "No", Null) ' MessageBox
        If Answ = DialogResponse.POSITIVE Then    ' If return value is Yes then
            Return False    ' the Event will not be consumed     
        Else                ' we leave the program
            Return True        ' the Event will be consumed to avoid
        End If                ' leaving the program
    Else
        Return True            ' the Event will be consumed to avoid
    End If
End Sub

Sub lblTitle_Click
    Dim p As PhoneIntents
    Dim Url As String = "http://computerise.my"
    StartActivity(p.OpenBrowser(Url))
End Sub

Sub btnLogin_Click
    StartActivity("Login")
End Sub

Sub btnRegister_Click
    StartActivity("Register")
End Sub

Sub TestConnection
    Dim Connect As HttpJob
    Connect.Initialize("Connect", Me)
    Connect.Download(strURL & "connect.php")
    ProgressDialogShow("Connecting to server...")
End Sub

Sub JobDone (Job As HttpJob)
    ProgressDialogHide
    If Job.Success = True Then
        Dim ret As String
        ret = Job.GetString
        Dim parser As JSONParser
        parser.Initialize(ret) 
        If Job.JobName = "Connect" Then
            Dim act As String = parser.NextValue
            If act = "Connected" Then
                ToastMessageShow("Connection success", True)
            End If 
        End If
    Else
        ToastMessageShow("Error: " & Job.ErrorMessage, True)
    End If
    Job.Release
End Sub

B4X:

#Region  Activity Attributes
    #FullScreen: False
    #IncludeTitle: False
#End Region

Sub Process_Globals

End Sub

Sub Globals
    Dim txtUserID As EditText
    Dim txtPassword As EditText
    Dim txtFullName As EditText
    Dim txtLocation As EditText
    Dim txtEmail As EditText
End Sub

Sub Activity_Create(FirstTime As Boolean)
    Activity.LoadLayout("frmRegister")
End Sub

Sub Activity_Resume

End Sub

Sub Activity_Pause (UserClosed As Boolean)

End Sub

Sub btnRegister_Click
    Dim strUserID As String = txtUserID.Text.Trim
    If strUserID = "" Then
        Msgbox("Please enter User ID", "Error")
        Return
    End If
    Dim strPassword As String = txtPassword.Text.Trim
    If strPassword = "" Then
        Msgbox("Please enter Password", "Error")
        Return
    End If
    Dim strFullName As String = txtFullName.Text.Trim
    If strFullName = "" Then
        Msgbox("Please enter Full Name", "Error")
        Return
    End If
    Dim strLocation As String = txtLocation.Text.Trim
    If strLocation = "" Then
        Msgbox("Please enter Location", "Error")
        Return
    End If
    Dim strEmail As String = txtEmail.Text.Trim
    If strEmail = "" Then
        Msgbox("Please enter Email", "Error")
        Return
    End If
    If Validate_Email(strEmail) = False Then
        Msgbox("Email format is incorrect", "Error")
        Return
    End If

    Dim Job1 As HttpJob
    Job1.Initialize("Register", Me)
    Job1.Download2(Main.strURL & "signup.php", _
      Array As String("Action", "Register", _
      "UserID", txtUserID.Text, _
      "Password", txtPassword.Text, _
      "FullName", txtFullName.Text, _
      "Location", txtLocation.text, _
      "Email", txtEmail.Text))
    ProgressDialogShow("Connecting to server...")
End Sub

Sub JobDone (Job As HttpJob)
    ProgressDialogHide
    If Job.Success Then
        Dim parser As JSONParser
        Dim res As String
        Dim action As String
        res = Job.GetString 
        parser.Initialize(res)         
        Select Job.JobName
            Case "Register"
                action = parser.NextValue
                If action = "Mail" Then
                    Msgbox("An email was sent to " & txtEmail.Text & ". Please click on the link to finish registration", "Registration")
                    Activity.Finish
                Else If action = "MailInUse" Then
                    Msgbox("The user id '" & txtUserID.Text & "' or email (" & txtEmail.Text & ") is already in used", "Registration")
                Else
                    Msgbox("Server does not return expected result.", "Registration")
                End If
        End Select
    Else
        'Log("Error: " & Job.ErrorMessage)
        ToastMessageShow("Error: " & Job.ErrorMessage, True)
    End If
    Job.Release
End Sub

' // Source: https://www.b4x.com/android/forum/threads/validate-a-correctly-formatted-email-address.39803/
Sub Validate_Email(EmailAddress As String) As Boolean
    Dim MatchEmail As Matcher = Regex.Matcher("^(?i)[a-z0-9!#$%&'*+/=?^_`{|}~-]+(?:\.[a-z0-9!#$%&'*+/=?^_`{|}~-]+)*@(?:[a-z0-9](?:[a-z0-9-]*[a-z0-9])?\.)+[a-z0-9](?:[a-z0-9-]*[a-z0-9])$", EmailAddress)

    If MatchEmail.Find = True Then
        'Log(MatchEmail.Match)
        Return True
    Else
        'Log("Oops, please double check your email address...")
        Return False
    End If
End Sub

B4X:

#Region  Activity Attributes
    #FullScreen: False
    #IncludeTitle: False
#End Region

Sub Process_Globals
    Dim strUserID As String
    Dim strUserName As String
End Sub

Sub Globals
    Dim txtUserID As EditText
    Dim txtPassword As EditText
    Dim lblMessage As Label
End Sub

Sub Activity_Create(FirstTime As Boolean)
    Activity.LoadLayout("frmLogin")
End Sub

Sub Activity_Resume

End Sub

Sub Activity_Pause (UserClosed As Boolean)

End Sub

Sub btnLogin_Click
    'Dim strUserID As String = txtUserID.Text.Trim
    lblMessage.Text = ""
    strUserID = txtUserID.Text.Trim
    If strUserID = "" Then
        Msgbox("Please enter User ID", "Error")
        Return
    End If
    Dim strPassword As String = txtPassword.Text.Trim
    If strPassword = "" Then
        Msgbox("Please enter Password", "Error")
        Return
    End If

    Dim Job2 As HttpJob
    Job2.Initialize("Login", Me)
    Job2.Download2(Main.strURL & "signin.php", _
    Array As String("user_id", strUserID, "password", strPassword))
    ProgressDialogShow("Connecting to server...")
End Sub

Sub JobDone (Job As HttpJob)
    ProgressDialogHide
    If Job.Success = True Then
        Dim ret As String
        Dim act As String 
        ret = Job.GetString  
        Dim parser As JSONParser
        parser.Initialize(ret) 
        act = parser.NextValue
        If act = "Not Found" Then
            ToastMessageShow("Login failed", True)
            lblMessage.Text = "Wrong User ID or Password!"
            lblMessage.TextColor = Colors.Red
        Else If act = "Not Activated" Then
            ToastMessageShow("Login failed", True)
            lblMessage.Text = "Account is not activated!"
            lblMessage.TextColor = Colors.Blue     
        Else If act = "Error" Then
            ToastMessageShow("Login failed", True)
            lblMessage.Text = "An error has occured!"
            lblMessage.TextColor = Colors.Red
        Else
            strUserName = act
            StartActivity("Member")
            Activity.Finish
        End If
    Else
        'Log("Error: " & Job.ErrorMessage)
        ToastMessageShow("Error: " & Job.ErrorMessage, True)
    End If
    Job.Release
End Sub

'Sub btnForgotMyPassword_Click
'    StartActivity("Forgot")
'End Sub

Sub btnResetMyPassword_Click
    StartActivity("Reset")
End Sub

B4X:

#Region  Activity Attributes
    #FullScreen: False
    #IncludeTitle: False
#End Region

Sub Process_Globals

End Sub

Sub Globals
    Type TwoLines (First As String, Second As String)
    Private ListView1 As ListView
    Private btnLogout As Button
    Private lblMessage As Label
End Sub

Sub Activity_Create(FirstTime As Boolean)
    Activity.LoadLayout("frmMember")
    lblMessage.Text = "Welcome, " & Login.strUserName
    LoadMemberList
End Sub

Sub Activity_Resume

End Sub

Sub Activity_Pause (UserClosed As Boolean)

End Sub

Sub LoadMemberList
    Dim Job3 As HttpJob
    Job3.Initialize("Member", Me)
    Job3.Download(Main.strURL & "member.php")
    ProgressDialogShow("Downloading list of registered members")
End Sub

Sub LogMeOut
    Dim Job4 As HttpJob
    Job4.Initialize("LogOut", Me)
    Job4.Download2(Main.strURL & "signout.php", _
    Array As String("user_id", Login.strUserID))
    ProgressDialogShow("Logging out...")
End Sub

Sub JobDone (Job As HttpJob)
    ProgressDialogHide
    If Job.Success = True Then
        Dim strReturn As String = Job.GetString
        Dim parser As JSONParser
        parser.Initialize(strReturn)
        If Job.JobName = "Member" Then
            Dim Members As List
            Dim strOnline As String
            Members = parser.NextArray 'returns a list with maps
            For i = 0 To Members.Size - 1
                Dim m As Map
                m = Members.Get(i)
                Dim TL As TwoLines
                If m.Get("online") = "Y" Then
                    strOnline = " (Online)"
                Else
                    strOnline = ""
                End If
                TL.First = m.Get("user_id") & strOnline
                TL.Second = m.Get("location")
                ListView1.AddTwoLines2(TL.First, TL.Second, TL)
            Next
        Else If Job.JobName = "LogOut" Then
            Dim act As String = parser.NextValue
            If act = "LoggedOut" Then
                ToastMessageShow("Logout successful", True)         
                StartActivity(Main)
                Activity.Finish
            End If         
        Else
            ToastMessageShow("Error: Invalid Value", True)
        End If
    Else
        'Log("Error: " & Job.ErrorMessage)
        ToastMessageShow("Error: " & Job.ErrorMessage, True)
    End If
    Job.Release
End Sub

Sub btnChangePassword_Click
    StartActivity("Change")
End Sub

Sub btnLogout_Click
    LogMeOut
End Sub

B4X:

#Region  Activity Attributes
    #FullScreen: False
    #IncludeTitle: False
#End Region

Sub Process_Globals

End Sub

Sub Globals
    Private txtEmail As EditText
    Dim strEmail As String
End Sub

Sub Activity_Create(FirstTime As Boolean)
    Activity.LoadLayout("frmReset")
End Sub

Sub Activity_Resume

End Sub

Sub Activity_Pause (UserClosed As Boolean)

End Sub

Sub btnSubmit_Click
    strEmail = txtEmail.Text.Trim
    If strEmail = "" Then
        Msgbox("Please enter Email", "Error")
        Return
    End If
    If Validate_Email(strEmail) = False Then
        Msgbox("Email format is incorrect", "Error")
        Return
    End If
    Dim Job5 As HttpJob
    Job5.Initialize("ResetPassword", Me)
    Job5.Download2(Main.strURL & "reset-password.php", _
      Array As String("Action", "RequestPasswordReset", _
      "Mail", strEmail))
    ProgressDialogShow("Connecting to server...")
End Sub

Sub JobDone (Job As HttpJob)
    ProgressDialogHide
    If Job.Success Then
    Dim res As String, action As String
        res = Job.GetString 
        Dim parser As JSONParser
        parser.Initialize(res)
        Select Job.JobName
            Case "ResetPassword"
                action = parser.NextValue
                If action = "ValidEmail" Then
                    Msgbox("An email was sent to " & strEmail & " to reset your password.", "Reset Password")             
                Else If action = "InvalidEmail" Then
                    Msgbox("The email is not registered in our database.", "Reset Password")
                End If
        End Select
    Else
        'Log("Error: " & Job.ErrorMessage)
        ToastMessageShow("Error: " & Job.ErrorMessage, True)
    End If
    Job.Release
End Sub

' // Source: https://www.b4x.com/android/forum/threads/validate-a-correctly-formatted-email-address.39803/
Sub Validate_Email(EmailAddress As String) As Boolean
    Dim MatchEmail As Matcher = Regex.Matcher("^(?i)[a-z0-9!#$%&'*+/=?^_`{|}~-]+(?:\.[a-z0-9!#$%&'*+/=?^_`{|}~-]+)*@(?:[a-z0-9](?:[a-z0-9-]*[a-z0-9])?\.)+[a-z0-9](?:[a-z0-9-]*[a-z0-9])$", EmailAddress)

    If MatchEmail.Find = True Then
        'Log(MatchEmail.Match)
        Return True
    Else
        'Log("Oops, please double check your email address...")
        Return False
    End If
End Sub

B4X:

#Region  Activity Attributes
    #FullScreen: False
    #IncludeTitle: False
#End Region

Sub Process_Globals

End Sub

Sub Globals
    Private txtEmail As EditText
    Private txtPassword1 As EditText
    Private txtPassword2 As EditText
    Private txtPassword3 As EditText
End Sub

Sub Activity_Create(FirstTime As Boolean)
    Activity.LoadLayout("frmChange")
End Sub

Sub Activity_Resume

End Sub

Sub Activity_Pause (UserClosed As Boolean)

End Sub

Sub btnSubmit_Click
    Dim strEmail As String = txtEmail.Text.Trim
    If strEmail = "" Then
        Msgbox("Please enter Your Email", "Error")
        Return
    End If
    Dim strPassword1 As String = txtPassword1.Text.Trim
    If strPassword1 = "" Then
        Msgbox("Please enter Current Password", "Error")
        Return
    End If
    Dim strPassword2 As String = txtPassword2.Text.Trim
    If strPassword2 = "" Then
        Msgbox("Please enter New Password", "Error")
        Return
    End If
    Dim strPassword3 As String = txtPassword3.Text.Trim
    If strPassword3 = "" Then
        Msgbox("Please reenter New Password", "Error")
        Return
    End If
    If strPassword2 <> strPassword3 Then
        Msgbox("New Password not match", "Error")
        Return
    End If

    Dim Job6 As HttpJob
    Job6.Initialize("Change", Me)
    Job6.Download2(Main.strURL & "change-password.php", _
    Array As String("Email", strEmail, _
    "Password1", strPassword1, _
    "Password2", strPassword2))
    ProgressDialogShow("Connecting to server...")
End Sub

Sub JobDone (Job As HttpJob)
    ProgressDialogHide
    If Job.Success = True Then
        Dim ret As String
        Dim act As String
        ret = Job.GetString
        Dim parser As JSONParser
        parser.Initialize(ret)
        act = parser.NextValue
        If act = "Success" Then
            Msgbox("Password updated successfully!", "Change Password")
        Else If act = "Not Found" Then 
            Msgbox("Email or Password not correct!", "Change Password")
        Else If act = "Error" Or act = "Failed" Then
            Msgbox("An error occured!", "Change Password")
        Else ' Failed
            Msgbox("Uncaught error!", "Change Password")
        End If
    Else
        'Log("Error: " & Job.ErrorMessage)
        ToastMessageShow("Error: " & Job.ErrorMessage, True)
    End If
    Job.Release
End Sub

PHP Scripts

PHP:

<?php
    print json_encode("Connected");
?>

PHP:

<?php
    $host = "localhost";
    $user = "myuser";
    $pass = "mypassword";
    $db = "demo_b4a";
    $mysqli = new mysqli($host, $user, $pass, $db) or die($mysqli->error);

    // $server = "http://demo.computerise.my/b4a/";
    $server = "http://192.168.43.191:8000/register-user-php/";
    $admin = "mailer@computerise.my";
    $sender = "no-reply@computerise.my";
?>

PHP:

<?php
    require 'db.php';
    try
    {
        if(!isset($_GET['Action']) || empty($_GET['Action']))
        {
            print json_encode("Parameter Error");
            exit;
        } 
        $action = $mysqli->escape_string($_GET["Action"]);

        switch ($action)
        {
            case "Register":
                if (!isset($_GET['UserID']) || empty($_GET['UserID']) ||
                    !isset($_GET['Email']) || empty($_GET['Email']) ||
                    !isset($_GET['Password']) || empty($_GET['Password']) ||
                    !isset($_GET['FullName']) || empty($_GET['FullName']) ||
                    !isset($_GET['Location']) || empty($_GET['Location']))
                {
                    print json_encode("Parameter Error");
                    exit;
                }
                $user = $mysqli->escape_string($_GET["UserID"]);
                $email = $mysqli->escape_string($_GET["Email"]);
                $password = $mysqli->escape_string($_GET["Password"]);
                $fullname = $mysqli->escape_string($_GET["FullName"]);
                $location = $mysqli->escape_string($_GET["Location"]);
                $sql = "SELECT * FROM tbl_member";
                $sql .= " WHERE email = '".$email."'";
                $sql .= " OR user_id = '".$user."'";
                $result = $mysqli->query($sql);
                $count = $result->num_rows;
                if ($count == 0)
                {
                    $randomnumber = mt_rand(111111, 999999);
                    $sql = "INSERT INTO tbl_member";
                    $sql .= " (user_id, user_name, pass_word,";
                    $sql .= " email, location,";
                    $sql .= " reg_status, reg_no, online)";
                    $sql .= " VALUES (";
                    $sql .= " '$user', '$fullname', '$password',";
                    $sql .= " '$email', '$location',";
                    $sql .= " 'M', $randomnumber, 'N')";
                    $mysqli->query($sql);
                    $to      = $email;
                    $subject = "B4A Register User Demo";
                    $message = "Hi ".$user.","."\r\n";
                    $message .= "Please click on this link to finish";
                    $message .= " the registration process:";
                    $message .= " ".$server."signup.php?Action=Mail";
                    $message .= "&Mail=".$email;
                    $message .= "&RegNo=".$randomnumber;
                    $message = wordwrap($message, 70, "\r\n");
                    $headers = "From: ".$sender."\r\n";
                    $headers .= "Reply-To: ".$sender."\r\n";
                    $headers .= "X-Mailer: PHP/".phpversion();

                    mail($to, $subject, $message, $headers);
                    // Notify me of new sign up
                    $to      = $admin;
                    $subject = "New member";
                    $message = "New member (".$user.") has signed up using our demo app.";
                    mail($to, $subject, $message, $headers);
                    print json_encode("Mail");
                }
                else
                    print json_encode("MailInUse");
                break;
            case "Mail":
                if (!isset($_GET['RegNo']) || empty($_GET['RegNo']) ||
                    !isset($_GET['Mail']) || empty($_GET['Mail']))
                {
                    print json_encode("Parameter Error");
                    exit;
                }     
                $regno = $mysqli->escape_string($_GET["RegNo"]);
                $mail = $mysqli->escape_string($_GET["Mail"]);
                $sql = "SELECT *";
                $sql .= " FROM tbl_member";
                $sql .= " WHERE email = '$mail'";
                $sql .= " AND reg_no = $regno";
                $sql .= " AND reg_status = 'M'";
                $result = $mysqli->query($sql);
                $count = $result->num_rows;
                if ($count == 0)
                {
                    print json_encode("This registration is not valid / email address is already registered");
                }
                else
                {
                    $sql = "UPDATE tbl_member";
                    $sql .= " SET reg_status = 'R'";
                    $sql .= " WHERE email = '$mail'";
                    $sql .= " AND reg_no = $regno";
                    $mysqli->query($sql);
                    echo("$mail is registered now :-)");
                    print json_encode("Success");
                }
                break;
            default:
                echo("Unauthorized action! Please use the app to register.");
        }
    }
    catch (Exception $e)
    {
        print json_encode("Failed");
        echo '<br />Caught exception: '.$e->getMessage()."\n";
    } 
?>

PHP:

<?php
    require 'db.php';
    try
    {
        if (!isset($_GET['user_id']) || empty($_GET['user_id']) ||
            !isset($_GET['password']) || empty($_GET['password']))
        {
            print json_encode("Parameter Error");
            exit;
        }  
        $uid = $mysqli->escape_string($_GET["user_id"]);
        $pwd = $mysqli->escape_string($_GET["password"]);

        $sql = "SELECT user_name, reg_status";
        $sql .= " FROM tbl_member";
        $sql .= " WHERE user_id = '".$uid."'";
        $sql .= " AND pass_word = '".$pwd."'";
        $result = $mysqli->query($sql);
        if ($mysqli->errno)
        {
            print json_encode("Error");
            echo "<br />".$mysqli->error;
            exit;
        }
        else
        {
            if ($result->num_rows == 0)
            {
                print json_encode("Not Found");
                exit;
            }
            $row = $result->fetch_row();
            if ($row[1] == "M")
            {
                print json_encode("Not Activated");
            }
            else
            {
                print json_encode($row[0]);
                $sql = "UPDATE tbl_member";
                $sql .= " SET Online = 'N'";
                $sql .= " WHERE now()-time_stamp > 60";      
                $mysqli->query($sql);
                $sql = "UPDATE tbl_member";
                $sql .= " SET logins = logins + 1,";
                $sql .= " Online = 'Y',";
                $sql .= " time_stamp = now()";
                $sql .= " WHERE user_id = '$uid'";
                $mysqli->query($sql);
            }
        }
    }
    catch (Exception $e)
    {
        print json_encode("Failed");
        echo '<br />Caught exception: '.$e->getMessage()."\n";
    }
?>

PHP:

<?php
    require 'db.php';
    try
    {
        if(!isset($_GET['user_id']) || empty($_GET['user_id']))
        {
            print json_encode("Parameter Error");
            exit;
        }  
        $uid = $mysqli->escape_string($_GET["user_id"]);
        $sql = "SELECT online";
        $sql .= " FROM tbl_member";
        $sql .= " WHERE user_id = '$uid'";
        $result = $mysqli->query($sql);
        $count = $result->num_rows;
        if ($count == 0)
        {
              print json_encode("NotMember");
        }
        else
        {
            $sql = "UPDATE tbl_member";
            $sql .= " SET online = 'N'";
            $sql .= " WHERE user_id = '".$uid."'";
            $mysqli->query($sql);
            print json_encode("LoggedOut");
        }
    }
    catch (Exception $e)
    {
        print json_encode("Failed");
        echo '<br />Caught exception: '.$e->getMessage()."\n";
    }
?>

PHP:

<?php
    require 'db.php';
    try
    {
        $sql = "SELECT user_id, location, online";
        $sql .= " FROM tbl_member";
        $sql .= " ORDER BY id DESC";
        $result = $mysqli->query($sql);
        if ($mysqli->errno)
        {
            header("HTTP/1.1 500 Internal Server Error");
            echo $sql.'\n';
            echo $mysqli->error;
        }
        else
        {
            $rows = array();
            while ($row = $result->fetch_assoc())
            {
                $rows[] = $row;
            }
            print json_encode($rows);
        }
    }
    catch (Exception $e)
    {
        print json_encode("Failed");
        echo '<br />Caught exception: '.$e->getMessage()."\n";
    }
?>

PHP:

<?php
require 'db.php';
try
{
    if (!isset($_GET['Email']) || empty($_GET['Email']) ||
        !isset($_GET['Password1']) || empty($_GET['Password1']) ||
        !isset($_GET['Password2']) || empty($_GET['Password2']))
    {
        print json_encode("Parameter Error");
        exit;
    }
    $email = $mysqli->escape_string($_GET["Email"]);
    $password1 = $mysqli->escape_string($_GET["Password1"]);
    $password2 = $mysqli->escape_string($_GET["Password2"]);
    $sql = "SELECT * FROM tbl_member";
    $sql .= " WHERE email = '".$email."'";
    $sql .= " AND pass_word = '".$password1."'";
    $result = $mysqli->query($sql);
    $count = $result->num_rows;
    if ($count == 0)
    {  
        print json_encode("Not Found");
        echo("<br />User not found or incorrect password");
    }
    else
    {
        $sql = "UPDATE tbl_member";
        $sql .= " SET pass_word = '".$password2."'";
        $sql .= " WHERE email = '".$email."'";
        $sql .= " AND pass_word = '".$password1."'";
        $mysqli->query($sql);  
        print json_encode("Success");
        echo("<br />$email has been updated");
    }
}
catch (Exception $e)
{
    print json_encode("Failed");
    echo '<br />Caught exception: '.$e->getMessage()."\n";
}  
?>

PHP:

<?php
    require 'db.php';
    try
    {
        if(!isset($_GET['Action']) || empty($_GET['Action']))
        {
            print json_encode("Parameter Error");
            exit;
        }
        $action = $mysqli->escape_string($_GET["Action"]);
        switch ($action)
        {
            case "RequestPasswordReset":
                if(!isset($_GET['Mail']) || empty($_GET['Mail']))
                {
                    print json_encode("Parameter Error");
                    exit;
                }      
                $email = $mysqli->escape_string($_GET["Mail"]);
                $sql = "SELECT user_name";
                $sql .= " FROM tbl_member";
                $sql .= " WHERE email = '" . $email . "'";
                $result = $mysqli->query($sql);
                if ($mysqli->errno)
                {
                    print json_encode("MySQL_Error");
                    echo "<br />MySQL_Error: ".$mysqli->error;
                    exit;
                }
                $count = $result->num_rows;
                if ($count == 0)
                {
                    print json_encode("InvalidEmail");
                    exit;
                }
                else
                {
                    // Generate a random code and update to reg_no
                    $verify_code = mt_rand(100000, 999999);
                    $row = $result->fetch_row();
                    $username = $row[0];
                    $sql = "UPDATE tbl_member";
                    $sql .= " SET reg_no = '" . $verify_code . "'";
                    $sql .= " WHERE email = '" . $email . "'";
                    $mysqli->query($sql);
                    if ($mysqli->errno)
                    {
                        print json_encode("MySQL_Error");
                        echo "<br />MySQL_Error: ".$mysqli->error;
                        exit;
                    }
                    // Send email to user to confirm the reset
                    $to      = $email;
                    $subject = 'Request to reset your password';
                    $message = "Hi " . $username . ",\r\n";
                    $message .= "We have received a request from you to reset your password.\r\n";
                    $message .= "If this action is not requested by you,";
                    $message .= " please ignore this email.\r\n";
                    $message .= "Otherwise, click the link below:\r\n";
                    $message .= $server."reset-password.php?Action=ConfirmPasswordReset";
                    $message .= "&Mail=".$email;
                    $message .= "&Code=".$verify_code . "\r\n\r\n";
                    $message .= "If not working, please copy the link to your browser.\r\n\r\n";
                    $message .= "Regards,\r\n";
                    $message .= "Aeric";
                    $message = wordwrap($message, 70, "\r\n");
                    $headers = "From: ".$sender."\r\n";
                    $headers .= "Reply-To: ".$sender."\r\n";
                    $headers .= "X-Mailer: PHP/" . phpversion();
                    mail($to, $subject, $message, $headers);
                    print json_encode("ValidEmail");
                }
            break;
        case "ConfirmPasswordReset":
            if (!isset($_GET['Mail']) || empty($_GET['Mail']) ||
                !isset($_GET['Code']) || empty($_GET['Code']))
            {
                print json_encode("Parameter Error");
                exit;
            }
            $email = $mysqli->escape_string($_GET["Mail"]);
            $code = $mysqli->escape_string($_GET["Code"]);
            $sql = "SELECT user_name";
            $sql .= " FROM tbl_member";
            $sql .= " WHERE email = '" . $email . "'";
            $sql .= " AND reg_no = " . $code;
            $result = $mysqli->query($sql);
            if ($mysqli->errno)
            {
                print json_encode("MySQL_Error");
                echo "<br />MySQL_Error: ".$mysqli->error;
                exit;
            }
            $count = $result->num_rows;
            if ($count == 0)
            {
                print json_encode("InvalidEmailOrCode");
                exit;
            }
            // Generate a default password randomly (e.g. pw1234)
            // You may use other method to generate a more complex password with alphanumeric
            $rand_number = mt_rand(1000, 9999);
            $default = "pw" . $rand_number;
            $row = $result->fetch_row();
            $username = $row[0];
            $sql = "UPDATE tbl_member";
            $sql .= " SET pass_word = '" . $default . "'";
            $sql .= " WHERE email = '" . $email . "'";
            $mysqli->query($sql);
            if ($mysqli->errno)
            {
                print json_encode("MySQL_Error");
                echo "<br />MySQL_Error: ".$mysqli->error;
                exit;
            }
            $to      = $email;
            $subject = 'Your New Password';
            $message = "Hi ".$username.",\r\n";
            $message .= "Your password has been reset.";
            $message .= " Please use your new password to log in.\r\n";
            $message .= "Password: " . $default;
            $message = wordwrap($message, 70, "\r\n");
            $headers = "From: ".$sender."\r\n";
            $headers .= "Reply-To: ".$sender."\r\n";
            $headers .= "X-Mailer: PHP/" . phpversion();
            mail($to, $subject, $message, $headers);
            //print json_encode("PasswordChanged");
            echo "Your password has been reset.<br />Your new password is sent to $email.";
            break;
        default:
            echo("Unauthorized action! Please use the app to reset your password.");
        }
    }
    catch (Exception $e)
    {  
        print json_encode("Failed");
        echo '<br />Caught exception: '.$e->getMessage()."\n";
    }
?>

Code also available in Github

pyhoon/Register-User-B4A

pyhoon/Register-User-PHP

aeric · Feb 21, 2016

cwkoomy said:
i use pay hosting, i change the signin.php update, then can login, but error " An error has occurred in sub:member_jobdone(java line:421) java.lang.NullPointerException
and Welcome :null , is it change Login.strUserName to strUserID? ?

Do you have mysql database in your hosting server?

jchal · Mar 8, 2016

as i am new to this i am trying to do a password recovery but....... as i say i am new
i made anew activity called forgotpwd and a php file caled pwdrecovery.php
my coude for forgotpwd activity is the following
#Region Activity Attributes
#FullScreen: False
#IncludeTitle: False
#End Region

Sub Process_Globals
'These global variables will be declared once when the application starts.
'These variables can be accessed from all modules.

End Sub

Sub Globals
'These global variables will be redeclared each time the activity is created.
'These variables can only be accessed from this module.
Dim txtEmail As EditText
Private btnsendnewpwd As Button
End Sub

Sub Activity_Create(FirstTime As Boolean)
'Do not forget to load the layout file created with the visual designer. For example:
'Activity.LoadLayout("Layout1")
Activity.LoadLayout("frmforgotpwd")

End Sub

Sub Activity_Resume

End Sub

Sub Activity_Pause (UserClosed As Boolean)

End Sub

Sub btnsendnewpwd_Click
Dim strEmail As String = txtEmail.Text.Trim
If strEmail = "" Then
Msgbox("Please enter Email", "Error")
Return
End If
If Validate_Email(strEmail) = False Then
Msgbox("Email format is incorrect", "Error")
Return
End If

Dim forgotpwd As HttpJob
forgotpwd.Initialize("forgotpwd", Me)
forgotpwd.Download2("http://www.mydomainname.com/pwdrecovery.php", _
Array As String("Action", "forgotpwd", "Email", txtEmail.Text))
ProgressDialogShow("Connecting to server...")
Msgbox("A mail was sent to your e-mail. Please click on the link to finish registration", "forgotpwd")
Activity.Finish

End Sub

' // Source: https://www.b4x.com/android/forum/threads/validate-a-correctly-formatted-email-address.39803/
Sub Validate_Email(EmailAddress As String) As Boolean
Dim MatchEmail As Matcher = Regex.Matcher("^(?i)[a-z0-9!#$%&'*+/=?^_`{|}~-]+(?:\.[a-z0-9!#$%&'*+/=?^_`{|}~-]+)*@(?:[a-z0-9](?:[a-z0-9-]*[a-z0-9])?\.)+[a-z0-9](?:[a-z0-9-]*[a-z0-9])$", EmailAddress)

If MatchEmail.Find = True Then
Log(MatchEmail.Match)
Return True
Else
Log("Oops, please double check your email address...")
Return False
End If
End Sub

and the code for php is the following:
<?php
$host = "localhost";
$db = "tmydb";
$user = "myuserdb";
$pw = "test";

$con = mysql_connect($host,$user,$pw) or die(mysql_error());
mysql_select_db($db) or die(mysql_error());
mysql_query("SET CHARACTER SET utf8");
mysql_query("SET NAMES 'utf8'");

$action = $_GET["Action"];

switch ($action) {
case "forgotpwd":
$user = mysql_real_escape_string($_GET["UserID"]);
$email = mysql_real_escape_string($_GET["Email"]);

$q = mysql_query("SELECT * FROM tbl_member WHERE Email= '$email'");

$user =$rows['UserID'];
$pass = $rows['pass_word'];
$count = mysql_num_rows($q);

$to = $email;
$subject = 'Your password is';
$message = 'Hi ' . $user . ',' . "\r\n" . 'this is your password is' . $pass ;
$message = wordwrap($message, 70, "\r\n");
$headers = 'From: info@mydomainname.com' . "\r\n" . 'Reply-To: info@mydomainname.com' . "\r\n" . 'X-Mailer: PHP/' . phpversion();

}
else

break;

}
break;
default:
echo("Unauthorized action! Please use the app to register.");
}
?>

but the app stops inProgressDialogShow("Connecting to server...")
what i am making wrong???

aeric · Mar 8, 2016

You are missing Jobdone.

jchal · Mar 9, 2016

now i am having a problem with my php i have managed to do the jobdone, but in e-mails i get the $row[pass_word] and $row[user_name] are empty what is my mistaske? cah you help?

<?php
$host = "localhost";
$db = "tmydb";
$user = "myuserdb";
$pw = "test";

$con = mysql_connect($host,$user,$pw) or die(mysql_error());
mysql_select_db($db) or die(mysql_error());
mysql_query("SET CHARACTER SET utf8");
mysql_query("SET NAMES 'utf8'");

$action = $_GET["Action"];

switch ($action) {
case "forgotpwd":

$email = mysql_real_escape_string($_GET["Email"]);
$q = mysql_query("SELECT * FROM tbl_member WHERE email = '$email' ");
$count = mysql_num_rows($q);

if ($count == 1)
{

$res = mysql_query($sql);
while($r = mysql_fetch_assoc($res))

$to = $email;
$subject = 'Your Password';
$message = 'Hi ' . $row[user_name]. ',' . "\r\n" . 'this is your password as requested. : password=' . $row[pass_word];
$message = wordwrap($message, 70, "\r\n");
$headers = 'From:info@mydomainname.com' . "\r\n" . 'Reply-To:info@mydomainname.com' . "\r\n" . 'X-Mailer: PHP/' . phpversion();

mail($to, $subject, $message, $headers);
// Notify me of new sign up
mail('info@mydomainname.com', 'password request', 'the member (' . $row[user_name] . ') has asked a new password for the app.', $headers);

print json_encode ("Mail");
}

else
print json_encode ("Mailnotfound");
break;

case "Mail":
$mail=$_GET["Mail"];

$q = mysql_query("SELECT * FROM tbl_member WHERE email = '$mail' ");
$count=mysql_num_rows($q);

if ($count == 0)
{
print json_encode ("This mail address does not exist in our database");
}
else {

echo("$mail is send");
}
break;
default:
echo("Unauthorized action! Please use the app.");
}
?>

aeric · Mar 9, 2016

jchal said:

now i am having a problem with my php i have managed to do the jobdone, but in e-mails i get the $row[pass_word] and $row[user_name] are empty what is my mistaske? cah you help?

PHP:

<?php
$host = "localhost";
$db = "tmydb";
$user = "myuserdb";
$pw = "test";

$con = mysql_connect($host,$user,$pw) or die(mysql_error());
mysql_select_db($db) or die(mysql_error());
mysql_query("SET CHARACTER SET utf8");
mysql_query("SET NAMES 'utf8'");

$action = $_GET["Action"];

switch ($action) {
    case "forgotpwd":
     
        $email = mysql_real_escape_string($_GET["Email"]);  
        $q = mysql_query("SELECT * FROM tbl_member WHERE email = '$email' ");
        $count = mysql_num_rows($q);
         
        if ($count == 1)
            {        

           $res = mysql_query($sql);
while($row = mysql_fetch_assoc($res))  //<----------  $row not $r

            $to      = $email;
            $subject = 'Your Password';
            $message = 'Hi ' . $row[user_name]. ',' . "\r\n" . 'this is your password as requested. : password=' . $row[pass_word];
            $message = wordwrap($message, 70, "\r\n");
            $headers = 'From:info@mydomainname.com' . "\r\n" . 'Reply-To:info@mydomainname.com' . "\r\n" . 'X-Mailer: PHP/' . phpversion();

            mail($to, $subject, $message, $headers);
            // Notify me of new sign up
            mail('info@mydomainname.com', 'password request', 'the member (' . $row[user_name] . ') has asked a new password for the app.', $headers);

            print json_encode ("Mail");
            }        

        else
            print json_encode ("Mailnotfound");    
            break;

    case "Mail":
             $mail=$_GET["Mail"];
   
        $q = mysql_query("SELECT * FROM tbl_member WHERE email = '$mail' ");
        $count=mysql_num_rows($q);
   
        if ($count == 0)
            {
            print json_encode ("This mail address does not exist in our database");
            }        
        else {

            echo("$mail is send");
            }
        break;
    default:
            echo("Unauthorized action! Please use the app.");
}
?>

aeric · Mar 9, 2016

I think you also need to modify the following

$message = 'Hi ' . $row[user_name]. ',' . "\r\n" . 'this is your password as requested. : password=' . $row[pass_word];

to

$username = $row["user_name"];
$password = $row["pass_word"];
$message = 'Hi ' . $username . ',' . "\r\n" . 'This is your password as requested. : password : ' . $password;

jchal · Mar 9, 2016

hre is my new updated code, i still face problems like the first e-mail with the pass word is not cumming any more, and the second e-mail is comming to my mail box but empty.
e-mail rusult below
the member () has asked a new password for the app.
php source code below

<?php
$host = "localhost";
$db = "tmydb";
$user = "myuserdb";
$pw = "test";
$con = mysql_connect($host,$user,$pw) or die(mysql_error());
mysql_select_db($db) or die(mysql_error());
mysql_query("SET CHARACTER SET utf8");
mysql_query("SET NAMES 'utf8'");

$action = $_GET["Action"];

switch ($action) {
case "forgotpwd":

$email = mysql_real_escape_string($_GET["Email"]);
$q = mysql_query("SELECT * FROM tbl_member WHERE email = '$email' ");
$count = mysql_num_rows($q);

if ($count == 1)
{

$res = mysql_query($sql);
while($row = mysql_fetch_assoc($res))

$to = $email;
$subject = 'Your Password';
$username = $row["user_name"];
$password = $row["pass_word"];
$message = 'Hi ' . $username . ',' . "\r\n" .'This is your password as requested. : password : ' . $password;
$message = wordwrap($message, 70, "\r\n");
$headers = 'From: nfo@mydomain.com' . "\r\n" . 'Reply-To: info@mydomain.com' . "\r\n" . 'X-Mailer: PHP/' . phpversion();

mail($to, $subject, $message, $headers);
// Notify me of new sign up
mail('info@mydomain.com', 'password request', 'the member (' . $username . ') has asked a new password for the app.', $headers);

print json_encode ("Mail");
}

else
print json_encode ("Mailnotfound");
break;

case "Mail":
$mail=$_GET["Mail"];

$q = mysql_query("SELECT * FROM tbl_member WHERE email = '$mail' ");
$count=mysql_num_rows($q);

if ($count == 0)
{
print json_encode ("This mail address does not exist in our database");
}
else {

echo("$mail is send");
}
break;
default:
echo("Unauthorized action! Please use the app.");
}
?>

aeric · Mar 9, 2016

jchal said:
hre is my new updated code, i still face problems like the first e-mail with the pass word is not cumming any more, and the second e-mail is comming to my mail box but empty.
e-mail rusult below
the member () has asked a new password for the app.
php source code below

<?php
$host = "localhost";
$db = "tmydb";
$user = "myuserdb";
$pw = "test";
$con = mysql_connect($host,$user,$pw) or die(mysql_error());
mysql_select_db($db) or die(mysql_error());
mysql_query("SET CHARACTER SET utf8");
mysql_query("SET NAMES 'utf8'");

$action = $_GET["Action"];

switch ($action) {
case "forgotpwd":

$email = mysql_real_escape_string($_GET["Email"]);
$q = mysql_query("SELECT * FROM tbl_member WHERE email = '$email' ");
$count = mysql_num_rows($q);

if ($count == 1)
{

$res = mysql_query($sql);
while($row = mysql_fetch_assoc($res))

$to = $email;
$subject = 'Your Password';
$username = $row["user_name"];
$password = $row["pass_word"];
$message = 'Hi ' . $username . ',' . "\r\n" .'This is your password as requested. : password : ' . $password;
$message = wordwrap($message, 70, "\r\n");
$headers = 'From: nfo@mydomain.com' . "\r\n" . 'Reply-To: info@mydomain.com' . "\r\n" . 'X-Mailer: PHP/' . phpversion();

mail($to, $subject, $message, $headers);
// Notify me of new sign up
mail('info@mydomain.com', 'password request', 'the member (' . $username . ') has asked a new password for the app.', $headers);

print json_encode ("Mail");
}

else
print json_encode ("Mailnotfound");
break;

case "Mail":
$mail=$_GET["Mail"];

$q = mysql_query("SELECT * FROM tbl_member WHERE email = '$mail' ");
$count=mysql_num_rows($q);

if ($count == 0)
{
print json_encode ("This mail address does not exist in our database");
}
else {

echo("$mail is send");
}
break;
default:
echo("Unauthorized action! Please use the app.");
}
?>

$email = mysql_real_escape_string($_GET["Email"]);
$sql = "SELECT * FROM tbl_member WHERE email = '" . $email . "'";
$res = mysql_query($sql);
$count = mysql_num_rows($res);
if ($count == 1)
{
while($row = mysql_fetch_assoc($res))

I haven't test hope this would be working for you.

jchal · Mar 9, 2016

i am getting an Error: Internal Server Error

aeric · Mar 9, 2016

jchal said:
i am getting an Error: Internal Server Error

I try to reproduce this.

aeric · Mar 9, 2016

Here is my code for the request forgotten password.

B4A Code

B4X:

#Region  Activity Attributes 
    #FullScreen: False
    #IncludeTitle: False
#End Region

Sub Process_Globals

End Sub

Sub Globals
    Private txtEmail As EditText
    Dim strEmail As String
End Sub

Sub Activity_Create(FirstTime As Boolean)
    Activity.LoadLayout("frmForgot")
End Sub

Sub Activity_Resume

End Sub

Sub Activity_Pause (UserClosed As Boolean)

End Sub

Sub btnSubmit_Click
    strEmail = txtEmail.Text.Trim
    If strEmail = "" Then
        Msgbox("Please enter Email", "Error")
        Return
    End If   
    If Validate_Email(strEmail) = False Then
        Msgbox("Email format is incorrect", "Error")
        Return
    End If
    Dim Forgot As HttpJob
    Forgot.Initialize("SendPassword", Me)
    Forgot.Download2("http://kbase.herobo.com/forgot-password.php", _
      Array As String("Action", "RequestPassword", _
     "Email", strEmail))
    ProgressDialogShow("Connecting to server...")   
End Sub

Sub JobDone (Job As HttpJob)
    ProgressDialogHide
    If Job.Success Then
    Dim res As String, action As String
        res = Job.GetString        
        Dim parser As JSONParser
        parser.Initialize(res)                
        Select Job.JobName
            Case "SendPassword"
                action = parser.NextValue
                If action = "ValidEmail" Then
                    Msgbox("The password was sent to " & strEmail & ".", "Forgot Password")                   
                Else If action = "InvalidEmail" Then
                    Msgbox("The email is not registered in our database.", "Forgot Password")
                End If
        End Select
    Else
        'Log("Error: " & Job.ErrorMessage)
        ToastMessageShow("Error: " & Job.ErrorMessage, True)
    End If
    Job.Release   
End Sub

' // Source: https://www.b4x.com/android/forum/threads/validate-a-correctly-formatted-email-address.39803/
Sub Validate_Email(EmailAddress As String) As Boolean
    Dim MatchEmail As Matcher = Regex.Matcher("^(?i)[a-z0-9!#$%&'*+/=?^_`{|}~-]+(?:\.[a-z0-9!#$%&'*+/=?^_`{|}~-]+)*@(?:[a-z0-9](?:[a-z0-9-]*[a-z0-9])?\.)+[a-z0-9](?:[a-z0-9-]*[a-z0-9])$", EmailAddress)

    If MatchEmail.Find = True Then
        'Log(MatchEmail.Match)
        Return True
    Else
        'Log("Oops, please double check your email address...") 
        Return False
    End If
End Sub

PHP Script

PHP:

<?php
$host = "mysql16.000webhost.com";
$db = "a1438837_db";
$user = "a1438837_id";
$pw = "a1438837";

$con = mysql_connect($host,$user,$pw) or die(mysql_error());
mysql_select_db($db) or die(mysql_error());
mysql_query("SET CHARACTER SET utf8");
mysql_query("SET NAMES 'utf8'");

$action = $_GET["Action"];
$email = mysql_real_escape_string($_GET["Email"]);

switch ($action) {
    case "RequestPassword":        
        $sql = "SELECT user_name, pass_word FROM tbl_member WHERE email = '" . $email . "'";
        $res = mysql_query($sql);
        if (!$res) {
            print json_encode("MySQL_Error");
            echo "<br />" . mysql_error();
            exit;
        }
        $count = mysql_num_rows($res);            
        if ($count == 0) {
            print json_encode("InvalidEmail");
        }
        else {
            $row = mysql_fetch_row($res);
            $to      = $email;
            $subject = 'Your Password';
            $username = $row[0];
            $password = $row[1];
            $message = "Hi " . $username . ",\r\n";
            $message .= "This is your password as requested.\r\n";
            $message .= "Password: " . $password;
            $message = wordwrap($message, 70, "\r\n");
            $headers = "From: no-reply@kbase.herobo.com" . "\r\n";
            $headers .= "Reply-To: no-reply@kbase.herobo.com\r\n";
            $headers .= "X-Mailer: PHP/" . phpversion();
            mail($to, $subject, $message, $headers);
            print json_encode ("ValidEmail");
        }
        break;
    default:
            echo("Unauthorized action! Please use the app to register.");
}
?>

Cheers!

aeric · Mar 9, 2016

Above method is to send the existing password to the user.

To request for new password, please use this:
B4A Code

B4X:

#Region  Activity Attributes 
    #FullScreen: False
    #IncludeTitle: False
#End Region

Sub Process_Globals

End Sub

Sub Globals
    Private txtEmail As EditText
    Dim strEmail As String
End Sub

Sub Activity_Create(FirstTime As Boolean)
    Activity.LoadLayout("frmForgot")
End Sub

Sub Activity_Resume

End Sub

Sub Activity_Pause (UserClosed As Boolean)

End Sub

Sub btnSubmit_Click
    strEmail = txtEmail.Text.Trim
    If strEmail = "" Then
        Msgbox("Please enter Email", "Error")
        Return
    End If   
    If Validate_Email(strEmail) = False Then
        Msgbox("Email format is incorrect", "Error")
        Return
    End If
    Dim Reset As HttpJob
    Reset.Initialize("ResetPassword", Me)
    Reset.Download2("http://kbase.herobo.com/reset-password.php", _
      Array As String("Action", "RequestPasswordReset", _
     "Mail", strEmail))
    ProgressDialogShow("Connecting to server...")
End Sub

Sub JobDone (Job As HttpJob)
    ProgressDialogHide
    If Job.Success Then
    Dim res As String, action As String
        res = Job.GetString        
        Dim parser As JSONParser
        parser.Initialize(res)
        Select Job.JobName
            Case "ResetPassword"
                action = parser.NextValue
                If action = "ValidEmail" Then
                    Msgbox("An email was sent to " & strEmail & " to reset your password.", "Reset Password")                   
                Else If action = "InvalidEmail" Then
                    Msgbox("The email is not registered in our database.", "Reset Password")
                End If
        End Select
    Else
        'Log("Error: " & Job.ErrorMessage)
        ToastMessageShow("Error: " & Job.ErrorMessage, True)
    End If
    Job.Release   
End Sub

' // Source: https://www.b4x.com/android/forum/threads/validate-a-correctly-formatted-email-address.39803/
Sub Validate_Email(EmailAddress As String) As Boolean
    Dim MatchEmail As Matcher = Regex.Matcher("^(?i)[a-z0-9!#$%&'*+/=?^_`{|}~-]+(?:\.[a-z0-9!#$%&'*+/=?^_`{|}~-]+)*@(?:[a-z0-9](?:[a-z0-9-]*[a-z0-9])?\.)+[a-z0-9](?:[a-z0-9-]*[a-z0-9])$", EmailAddress)

    If MatchEmail.Find = True Then
        'Log(MatchEmail.Match)
        Return True
    Else
        'Log("Oops, please double check your email address...") 
        Return False
    End If
End Sub

PHP Script

PHP:

<?php
$host = "mysql16.000webhost.com";
$db = "a1438837_db";
$user = "a1438837_id";
$pw = "a1438837";

$con = mysql_connect($host,$user,$pw) or die(mysql_error());
mysql_select_db($db) or die(mysql_error());
mysql_query("SET CHARACTER SET utf8");
mysql_query("SET NAMES 'utf8'");

$action = $_GET["Action"];
switch ($action) {
    case "RequestPasswordReset":
        $email = mysql_real_escape_string($_GET["Mail"]);
        $sql = "SELECT user_name FROM tbl_member WHERE email = '" . $email . "'";
        $res = mysql_query($sql);
        if (!$res) {
            print json_encode("MySQL_Error");
            echo "<br />MySQL_Error: " . mysql_error();
            exit;
        }
        $count = mysql_num_rows($res);            
        if ($count == 0) {
            print json_encode("InvalidEmail");
            exit;
        }
        else {
            // Generate a random code and update to reg_no
            $verify_code = mt_rand(100000, 999999);
            $row = mysql_fetch_row($res);
            $username = $row[0];
            $sql = "UPDATE tbl_member SET reg_no = '" . $verify_code . "' WHERE email = '" . $email . "'";
            $res = mysql_query($sql);
            if (!$res) {
                print json_encode("MySQL_Error");
                echo "<br />MySQL_Error: " . mysql_error();
                exit;
            }
            // Send email to user to confirm the reset
            $to      = $email;
            $subject = 'Request to reset your password';
            $message = "Hi " . $username . ",\r\n";
            $message .= "We have received a request from you to reset your password.\r\n";
            $message .= "If this action is not requested by you, please ignore this email.\r\n";
            $message .= "Otherwise, click the link below:\r\n";
            $message .= "http://kbase.herobo.com/reset-password.php?Action=ConfirmPasswordReset&Mail=" . $email . "&Code=" . $verify_code . "\r\n\r\n";
            $message .= "If not working, please copy the link to your browser.\r\n\r\n";
            $message .= "Regards,\r\n";
            $message .= "Aeric";
            $message = wordwrap($message, 70, "\r\n");
            $headers = "From: no-reply@kbase.herobo.com" . "\r\n";
            $headers .= "Reply-To: no-reply@kbase.herobo.com\r\n";
            $headers .= "X-Mailer: PHP/" . phpversion();
            mail($to, $subject, $message, $headers);
            print json_encode("ValidEmail");
        }
        break;
    case "ConfirmPasswordReset":
        $email = mysql_real_escape_string($_GET["Mail"]);
        $code = mysql_real_escape_string($_GET["Code"]);
        $sql = "SELECT user_name FROM tbl_member WHERE email = '" . $email . "' AND reg_no = " . $code;
        $res = mysql_query($sql);
        if (!$res) {
            print json_encode("MySQL_Error");
            echo "<br />MySQL_Error: " . mysql_error();
            exit;
        }
        $count = mysql_num_rows($res);            
        if ($count == 0) {
            print json_encode("InvalidEmailOrCode");
            exit;
        }
            // Generate a default password randomly (e.g. pw1234)
            // You may use other method to generate a more complex password with alphanumeric
            $rand_number = mt_rand(1000, 9999);
            $default = "pw" . $rand_number;
            $row = mysql_fetch_row($res);
            $username = $row[0];
            $sql = "UPDATE tbl_member SET pass_word = '" . $default . "' WHERE email = '" . $email . "'";
            $res = mysql_query($sql);
            if (!$res) {
                print json_encode("MySQL_Error");
                echo "<br />MySQL_Error: " . mysql_error();
                exit;
            }
            $to      = $email;
            $subject = 'Your New Password';
            $message = "Hi " . $username . ",\r\n";
            $message .= "Your password has been reset. Please use your new password to log in.\r\n";
            $message .= "Password: " . $default;
            $message = wordwrap($message, 70, "\r\n");
            $headers = "From: no-reply@kbase.herobo.com" . "\r\n";
            $headers .= "Reply-To: no-reply@kbase.herobo.com\r\n";
            $headers .= "X-Mailer: PHP/" . phpversion();
            mail($to, $subject, $message, $headers);
            //print json_encode("PasswordChanged");
            echo "Your password has been reset.<br />Your new password is sent to $email.";
        break;
    default:
            echo("Unauthorized action! Please use the app to reset your password.");
}
?>

aeric · Mar 9, 2016

Try to understand the code and further on you can create the activity for "Change Password".

jchal · Mar 9, 2016

you are super!!! it works greate!!!

mangojack · Mar 12, 2016

@aeric .. many thanks for the thread, having not much experience with PHP it was of great help.

I was wondering if you could look at / edit the Update for signin.php Post #3. I found it a bit confusing and feel others might also.

Your Updated signin.php Post#3

PHP:

if ($count == 0) {
   print json_encode ("Not Found");
}
else {
// if ($row = mysql_fetch_array($res)) {
   if ($row["status"] == "M") {
      print json_encode ("Not Activate");
   }
  else {
    $res = mysql_query("UPDATE tbl_member SET logins = logins + 1 WHERE user_id = '$uid'");
    print json_encode ($row["user_name"]);
  }
// }
}//mysql_free_result($res);
?>

I finally managed to get it working with ...

PHP:

if ($count == 0) {
  print json_encode ("Not Found");
}

else {
   $row = mysql_fetch_array($res);    //  *******  this row commented
   if ($row["status"] == "M") {
      print json_encode ("Not Activate");
   }
   else {
      $res = mysql_query("UPDATE tbl_member SET logins = logins + 1 WHERE user_id = '$uid'");
      print json_encode ($row["user_name"]);
   }
}
?>

Something else that too some time to find cause of error ..
B4A code in the LogIn activity ...

B4X:

Sub JobDone (Job As HttpJob)
   ProgressDialogHide
   If Job.Success = True Then
    '.............
    '.............

  Else If act = "Not Activated" Then  ' Change to "Not Activate"

One more question ... After some reading I'm led to believe it is not wise to store login info directly
in the script php's located in public folders but rather in a separate php file in the 'Root folder' and use
'Include' keyword and the path to the php file .. ie:

PHP:

<?php

include ("/home/my_webhost_account/config.php");

$con = mysql_connect($host, $user, $pw) or die(mysql_error());
//.........................

Any info / advice appreciated .. Thanks and Regards

aeric · Mar 12, 2016

mangojack said:
@aeric .. many thanks for the thread, having not much experience with PHP it was of great help.

I was wondering if you could look at / edit the Update for signin.php Post #3. I found it a bit confusing and feel others might also.

Your Updated signin.php Post#3

PHP:

if ($count == 0) { print json_encode ("Not Found"); } else { // if ($row = mysql_fetch_array($res)) { if ($row["status"] == "M") { print json_encode ("Not Activate"); } else { $res = mysql_query("UPDATE tbl_member SET logins = logins + 1 WHERE user_id = '$uid'"); print json_encode ($row["user_name"]); } // } }//mysql_free_result($res); ?>

I finally managed to get it working with ...

PHP:

if ($count == 0) { print json_encode ("Not Found"); } else { $row = mysql_fetch_array($res); // ******* this row commented if ($row["status"] == "M") { print json_encode ("Not Activate"); } else { $res = mysql_query("UPDATE tbl_member SET logins = logins + 1 WHERE user_id = '$uid'"); print json_encode ($row["user_name"]); } } ?>

Something else that too some time to find cause of error ..
B4A code in the LogIn activity ...

B4X:

Sub JobDone (Job As HttpJob) ProgressDialogHide If Job.Success = True Then '............. '............. Else If act = "Not Activated" Then ' Change to "Not Activate"

One more question ... After some reading I'm led to believe it is not wise to store login info directly
in the script php's located in public folders but rather in a separate php file in the 'Root folder' and use
'Include' keyword and the path to the php file .. ie:

PHP:

<?php include ("/home/my_webhost_account/config.php"); $con = mysql_connect($host, $user, $pw) or die(mysql_error()); //.........................

Any info / advice appreciated .. Thanks and Regards

Thanks for your suggestions. This example is for learning purpose. May not suitable for production. Actually I have little experience in php too. For my production app, I am now using pdo and encryption. I also store my database login on separate file and use include.

killiak · Mar 14, 2016

Hi very nice work... i using this one and is great, but there is a but I have a problem, when you register a user, an email is send to confirm. This is an example of the link http://website/register.php?Action=Mail&Mail=myemail@gmail.com&RegNo=423222. I was wonder Was does that "register.php" do. Can we see that one? Thanks!

aeric · Mar 15, 2016

killiak said:
Hi very nice work... i using this one and is great, but there is a but I have a problem, when you register a user, an email is send to confirm. This is an example of the link http://website/register.php?Action=Mail&Mail=myemail@gmail.com&RegNo=423222. I was wonder Was does that "register.php" do. Can we see that one? Thanks!

Read this

Celso · Apr 8, 2016

Very cool, work like a charm!
Tks.

Celso · Apr 19, 2016

killiak said:
Hi very nice work... i using this one and is great, but there is a but I have a problem, when you register a user, an email is send to confirm. This is an example of the link http://website/register.php?Action=Mail&Mail=myemail@gmail.com&RegNo=423222. I was wonder Was does that "register.php" do. Can we see that one? Thanks!

Change the order and set email at last in the line!!

Android Code Snippet Register User example using OkHttpUtils2

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