I googled about customizing wp-signup.php but found no luck. Here's what I need:

  1. User will register.
  2. During registration process, user will pay first (like paypal or credit card).
  3. Create subdomain when user successfully paid.

My problem is: How can I add a payment field in wp-signup.php? I am really new to wordpress. Any guide or link is a big help to me.

Registration form something like this:

  • username
  • email address
  • gimme a site
  • payment
  • register button
  • 1
    But do you know how to program? In PHP, for instance.
    – brasofilo
    Nov 20, 2012 at 9:38
  • 1
    Yeah I know how to program PHP. But I'm new to CMS.
    – jayellos
    Nov 20, 2012 at 9:43
  • There is good tutorial here. Check this out tutorialstag.com/create-custom-wordpress-registration-page.html
    – Mubbashar
    Nov 20, 2012 at 13:10
  • I looked for this once and to the best of my knowledge there isn't anything available that requires the user the pay first. I think the hold up is that you can't add any billing info to a user until WP has an actual user record. I'll be interested to see what you come up with. Apr 3, 2013 at 14:47

1 Answer 1


The register form have different hooks for custom fields.

I hope this source example help you.

     * Add custom field to registration form
    add_action( 'register_form', 'fb_show_first_name_field' );
    add_action( 'register_post', 'fb_check_fields', 10, 3 );
    add_action( 'user_register', 'fb_register_extra_fields' );

    function fb_show_first_name_field() {
                <input id="twitter" type="text" tabindex="30" size="25" value="<?php echo $_POST['twitter']; ?>" name="twitter" />

    function fb_check_fields ( $login, $email, $errors ) {
        global $twitter;

        if ( '' === $_POST['twitter'] )
            $errors->add( 'empty_realname', "<strong>ERROR</strong>: Please Enter your twitter handle" );
            $twitter = $_POST['twitter'];


    function fb_register_extra_fields ( $user_id, $password = "", $meta = array() ) {

        update_user_meta( $user_id, 'twitter', $_POST['twitter'] );

It is also usefull, I think, that you add the fields to the rpofile page for changes and view of the field content.

     * Add additional custom field
    add_action( 'show_user_profile', 'fb_show_extra_profile_fields' );
    add_action( 'edit_user_profile', 'fb_show_extra_profile_fields' );

    function fb_show_extra_profile_fields( $user ) {
        <h3>Extra profile information</h3>
        <table class="form-table">
                <th><label for="twitter">Twitter</label></th>
                    <input type="text" name="twitter" id="twitter" value="<?php echo esc_attr( get_the_author_meta( 'twitter', $user->ID ) ); ?>" class="regular-text" /><br />
                    <span class="description">Please enter your Twitter username.</span>

    add_action( 'personal_options_update',  'fb_save_extra_profile_fields' );
    add_action( 'edit_user_profile_update', 'fb_save_extra_profile_fields' );
    function fb_save_extra_profile_fields( $user_id ) {

        if ( ! current_user_can( 'edit_user', $user_id ) )
            return FALSE;

        /* Copy and paste this line for additional fields. Make sure to change 'twitter' to the field ID. */
        update_user_meta( $user_id, 'twitter', $_POST['twitter'] );
  • I am using WordPress multisite subdirectory and subdomain. The register_form and register_post hooks do not work =( I wanted to customize the registration page but those hooks are not called in WP multisite.
    – user42826
    Jan 17, 2014 at 1:44

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