This is my code for a single site installation, which works well:
<?php
/*
Plugin Name: Custom Registration
Description: This plugin customizes WordPress's built-in user registration page.
Author: Hooman Tadbiri
Version: 0.1
*/
//1. Add a new form element...
add_action('register_form','myplugin_register_form');
function myplugin_register_form (){
$first_name = ( isset( $_POST['first_name'] ) ) ? $_POST['first_name']: '';
$last_name = ( isset( $_POST['last_name'] ) ) ? $_POST['last_name']: '';
$validation_code = ( isset( $_POST['validation_code'] ) ) ? $_POST['validation_code']: '';
?>
<p>
<label for="first_name"><?php _e('First Name','mydomain') ?><br />
<input type="text" name="first_name" id="first_name" class="input" value="<?php echo esc_attr(stripslashes($first_name)); ?>" size="25" /></label>
</p>
<p>
<label for="last_name"><?php _e('Last Name','mydomain') ?><br />
<input type="text" name="last_name" id="last_name" class="input" value="<?php echo esc_attr(stripslashes($last_name)); ?>" size="25" /></label>
</p>
<p>
<label for="validation_code"><?php _e('Validation Code','mydomain') ?><br />
<input type="text" name="validation_code" id="validation_code" class="input" value="<?php echo esc_attr(stripslashes($validation_code)); ?>" size="25" /></label>
</p>
<?php
}
//2. Add validation. In this case, we make sure first_name is required.
add_filter('registration_errors', 'myplugin_registration_errors', 10, 3);
function myplugin_registration_errors ($errors, $sanitized_user_login, $user_email) {
if ( $_POST['user_login'] < 8000000000 || $_POST['user_login'] > 10000000000 )
$errors->add( 'user_login_error', __('<strong>ERROR</strong>: not valid username','mydomain') );
if ( empty( $_POST['first_name'] ) )
$errors->add( 'first_name_error', __('<strong>ERROR</strong>: You must include a first name.','mydomain') );
if ( empty( $_POST['last_name'] ) )
$errors->add( 'last_name_error', __('<strong>ERROR</strong>: You must include a last name.','mydomain') );
if ( $_POST['validation_code'] != $_POST['user_login'] )
$errors->add( 'validation_code_error', __('<strong>ERROR</strong>: not correct','mydomain') );
return $errors;
}
//3. Finally, save our extra registration user meta.
add_action('user_register', 'myplugin_user_register');
function myplugin_user_register ($user_id) {
if ( isset( $_POST['first_name'] ) )
update_user_meta($user_id, 'first_name', $_POST['first_name']);
if ( isset( $_POST['last_name'] ) )
update_user_meta($user_id, 'last_name', $_POST['last_name']);
}
?>
(Usernames must be numeric, and users must enter a validation code which is their username for instance.)
And, this is my code for a multi-site installation, which doesn’t work:
<?php
/*
Plugin Name: Custom Registration
Description: This plugin customizes WordPress's built-in user registration page.
Author: Hooman Tadbiri
Version: 0.1
*/
//1. Add a new form element...
add_action('signup_header','myplugin_register_form');
function myplugin_register_form (){
$first_name = ( isset( $_POST['first_name'] ) ) ? $_POST['first_name']: '';
$last_name = ( isset( $_POST['last_name'] ) ) ? $_POST['last_name']: '';
$validation_code = ( isset( $_POST['validation_code'] ) ) ? $_POST['validation_code']: '';
?>
<p>
<label for="first_name"><?php _e('First Name','mydomain') ?><br />
<input type="text" name="first_name" id="first_name" class="input" value="<?php echo esc_attr(stripslashes($first_name)); ?>" size="25" /></label>
</p>
<p>
<label for="last_name"><?php _e('Last Name','mydomain') ?><br />
<input type="text" name="last_name" id="last_name" class="input" value="<?php echo esc_attr(stripslashes($last_name)); ?>" size="25" /></label>
</p>
<p>
<label for="validation_code"><?php _e('Validation Code','mydomain') ?><br />
<input type="text" name="validation_code" id="validation_code" class="input" value="<?php echo esc_attr(stripslashes($validation_code)); ?>" size="25" /></label>
</p>
<?php
}
//2. Add validation. In this case, we make sure first_name is required.
add_filter('wpmu_validate_user_signup', 'myplugin_registration_errors', 10, 3);
function myplugin_registration_errors ($errors, $sanitized_user_login, $user_email) {
if ( $_POST['user_login'] < 8000000000 || $_POST['user_login'] > 10000000000 )
$errors->add( 'user_login_error', __('<strong>ERROR</strong>: not valid username','mydomain') );
if ( empty( $_POST['first_name'] ) )
$errors->add( 'first_name_error', __('<strong>ERROR</strong>: You must include a first name.','mydomain') );
if ( empty( $_POST['last_name'] ) )
$errors->add( 'last_name_error', __('<strong>ERROR</strong>: You must include a last name.','mydomain') );
if ( $_POST['validation_code'] != $_POST['user_login'] )
$errors->add( 'validation_code_error', __('<strong>ERROR</strong>: not 2','mydomain') );
return $errors;
}
//3. Finally, save our extra registration user meta.
add_action('user_register', 'myplugin_user_register');
function myplugin_user_register ($user_id) {
if ( isset( $_POST['first_name'] ) )
update_user_meta($user_id, 'first_name', $_POST['first_name']);
if ( isset( $_POST['last_name'] ) )
update_user_meta($user_id, 'last_name', $_POST['last_name']);
}
?>
As a reminder, I don’t want to let my users create new blogs and I just need the “User accounts may be registered.”. The only thing I want more is to add first name, last name, and a validation field to the registration page.
