create registration form

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Creator: majed

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 * Plugin Name: WP Plugin Example
 * Description: Example plugin for creating a registration form.
 * Version: 1.0
 * Author: Your Name
 * Author URI:
 * Text Domain: wpturbo

// Register the shortcode for the registration form
add_shortcode( 'registration_form', 'wpturbo_registration_form_shortcode' );

 * Shortcode callback function for the registration form
function wpturbo_registration_form_shortcode() {

    // Check if the user is already logged in
    if ( is_user_logged_in() ) {
        echo '<p>You are already registered and logged in.</p>';
    } else {
        <form id="registration-form" method="post" action="<?php echo esc_url( admin_url( 'admin-post.php' ) ); ?>">
            <input type="hidden" name="action" value="wpturbo_process_registration">
            <!-- Add your registration form fields here -->
                <label for="username">Username:</label>
                <input type="text" name="username" id="username" required>
                <label for="email">Email:</label>
                <input type="email" name="email" id="email" required>
                <label for="password">Password:</label>
                <input type="password" name="password" id="password" required>
                <input type="submit" value="Register">

    return ob_get_clean();

 * Process the registration form data
add_action( 'admin_post_wpturbo_process_registration', 'wpturbo_process_registration' );
add_action( 'admin_post_nopriv_wpturbo_process_registration', 'wpturbo_process_registration' );
function wpturbo_process_registration() {
    // Verify the nonce
    if ( ! isset( $_POST['_wpnonce'] ) || ! wp_verify_nonce( $_POST['_wpnonce'], 'wpturbo_registration_nonce' ) ) {
        wp_die( 'Invalid nonce' );

    // Get the submitted form data
    $username = sanitize_text_field( $_POST['username'] );
    $email    = sanitize_email( $_POST['email'] );
    $password = $_POST['password'];

    // Create the new user
    $user_id = wp_create_user( $username, $password, $email );

    // Check if user creation was successful
    if ( is_wp_error( $user_id ) ) {
        // User creation failed, display an error message
        wp_die( $user_id->get_error_message() );
    } else {
        // User creation successful, log the user in
        wp_set_auth_cookie( $user_id );
        wp_redirect( home_url() ); // Redirect to the home page

This code will create a registration form using the [registration_form] shortcode. If the user is already logged in, it will display a message stating that they are already registered. Otherwise, it will display the registration form fields like username, email, and password. When the form is submitted, the wpturbo_process_registration() function will be called to process the form data. It will verify the nonce, sanitize the input, create a new user using wp_create_user(), and log the user in using wp_set_auth_cookie(). Finally, the user will be redirected to the home page.

Make sure to replace Your Name and with your actual name and website URL in the plugin header. Also, customize the form fields and validation as per your requirements.

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