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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 |
|---|---|
| 145 | if ( is_array( $_POST['blog'] ) == false ) |
| 146 | wp_die( __( 'Can’t create an empty site.' ) ); |
| 147 | $blog = $_POST['blog']; |
| 148 | $domain = ''; |
| 149 | if ( ! preg_match( '/(--)/', $blog['domain'] ) && preg_match( '|^([a-zA-Z0-9-])+$|', $blog['domain'] ) ) |
| 150 | $domain = strtolower( $blog['domain'] ); |
| 151 | |
| 152 | // If not a subdomain install, make sure the domain isn't a reserved word |
| 153 | if ( ! is_subdomain_install() ) { |
| 154 | $subdirectory_reserved_names = apply_filters( 'subdirectory_reserved_names', array( 'page', 'comments', 'blog', 'files', 'feed' ) ); |
| 155 | if ( in_array( $domain, $subdirectory_reserved_names ) ) |
| 156 | wp_die( sprintf( __('The following words are reserved for use by WordPress functions and cannot be used as blog names: <code>%s</code>' ), implode( '</code>, <code>', $subdirectory_reserved_names ) ) ); |
| 157 | } |
| 158 | |
| 159 | $email = sanitize_email( $blog['email'] ); |
| 160 | $title = $blog['title']; |
| 161 | |
| 162 | if ( empty( $domain ) ) |
| 163 | wp_die( __( 'Missing or invalid site address.' ) ); |