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The best way to understand what a hook does is to look at where it occurs in the source code.
do_action( "hook_name" )apply_filters( "hook_name", "what_to_filter" ).Remember, this hook may occur in more than one file. Moreover, the hook's context may change from version to version.
| Line | Code |
|---|---|
| 491 | // If registered more than two days ago, cancel registration and let this signup go through. |
| 492 | if ( $diff > 172800 ) |
| 493 | $wpdb->query( $wpdb->prepare("DELETE FROM $wpdb->signups WHERE user_email = %s", $user_email) ); |
| 494 | else |
| 495 | $errors->add('user_email', __('That email address has already been used. Please check your inbox for an activation email. It will become available in a couple of days if you do nothing.')); |
| 496 | } |
| 497 | |
| 498 | $result = array('user_name' => $user_name, 'orig_username' => $orig_username, 'user_email' => $user_email, 'errors' => $errors); |
| 499 | |
| 500 | return apply_filters('wpmu_validate_user_signup', $result); |
| 501 | } |
| 502 | |
| 503 | function wpmu_validate_blog_signup($blogname, $blog_title, $user = '') { |
| 504 | global $wpdb, $domain, $base, $current_site; |
| 505 | |
| 506 | $blog_title = strip_tags( $blog_title ); |
| 507 | $blog_title = substr( $blog_title, 0, 50 ); |
| 508 | |
| 509 | $errors = new WP_Error(); |