1

I am looking for any built in function that when I add a user or a user wants to register, the username will be automatically prepended with a predefined text.

For example, if the user registers with abul, the username will be saved as tk_abul.

  • how do you save the user? – Vishwa May 9 at 7:06
  • I want to add user from WordPress dashboard – Akhtarujjaman Shuvo May 9 at 7:09
1

You can use pre_user_login filter to customize username when registered. Example.

add_filter( 'pre_user_login', 'wpse_customize_user' );

function wpse_customize_user( $username ) {
    return 'tk_' . $username;
}
  • This is working but it is returning double tk after register. ex: tk_tk_username – Akhtarujjaman Shuvo May 9 at 8:28
0

Try user_register hook. The following code wasn't tested.

<?php
add_action( 'user_register', 'my_nickname_prepend_function' );

function my_nickname_prepend_function( $user_id )
{
    if ( isset( $_POST['user_login'] ) )
        update_user_meta( $user_id, 'nickname', 'tk_' . $_POST['user_login'] );
    }
}

Remember about user input validation.

Action Reference is at your service.

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