WP hooks navigation: Home/browse • Actions index • Filters index
To save our bandwidth, we show only a snippet of code around each occurence of the hook. View complete file in SVN (without highlighting).
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 |
|---|---|
| 611 | $illegal_names = array_merge( |
| 612 | $illegal_names, |
| 613 | /** |
| 614 | * Filter reserved site names on a sub-directory Multisite install. |
| 615 | * |
| 616 | * @since 3.0.0 |
| 617 | * |
| 618 | * @param array $subdirectory_reserved_names Array of reserved names. |
| 619 | */ |
| 620 | apply_filters( 'subdirectory_reserved_names', array( 'page', 'comments', 'blog', 'files', 'feed' ) ) |
| 621 | ); |
| 622 | } |
| 623 | |
| 624 | if ( empty( $blogname ) ) |
| 625 | $errors->add('blogname', __( 'Please enter a site name.' ) ); |
| 626 | |
| 627 | if ( preg_match( '/[^a-z0-9]+/', $blogname ) ) |
| 628 | $errors->add('blogname', __( 'Only lowercase letters (a-z) and numbers are allowed.' ) ); |
| 629 | |