Is it possible to remove username field from the registration page? If so, how?

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Is it possible to remove the username field from the registration page?

I want the users to enter only their email and password.
A new user should be created based on these two parameters only.

Is that possible and if so, how?

5

Absolutely YES, you can achieve this.

Rule 1: WordPress requires a username. We must provide a username.

Rule 2: Don’t edit WordPress core code.

We can achieve this by hiding username field, get email and store it as username.

Step-1: Remove Username textfield

add_action('login_head', function(){
?>
    <style>
        #registerform > p:first-child{
            display:none;
        }
    </style>

    <script type="text/javascript" src="https://wordpress.stackexchange.com/questions/52302/<?php echo site_url("/wp-includes/js/jquery/jquery.js'); ?>"></script>
    <script type="text/javascript">
        jQuery(document).ready(function($){
            $('#registerform > p:first-child').css('display', 'none');
        });
    </script>
<?php
});

Step-2: Remove Username error

//Remove error for username, only show error for email only.
add_filter('registration_errors', function($wp_error, $sanitized_user_login, $user_email){
    if(isset($wp_error->errors['empty_username'])){
        unset($wp_error->errors['empty_username']);
    }

    if(isset($wp_error->errors['username_exists'])){
        unset($wp_error->errors['username_exists']);
    }
    return $wp_error;
}, 10, 3);

Step-3: Manipulate Background Registration Functionality.

add_action('login_form_register', function(){
    if(isset($_POST['user_login']) && isset($_POST['user_email']) && !empty($_POST['user_email'])){
        $_POST['user_login'] = $_POST['user_email'];
    }
});

Put above code in your theme’s functions.php file.

You can also download a complete plugin to achieve this.

Plugin: https://wordpress.org/plugins/smart-wp-login/

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