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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 |
|---|---|
| 203 | if (! isset($_GET['noheader'])) |
| 204 | require_once(ABSPATH . 'wp-admin/admin-header.php'); |
| 205 | |
| 206 | /** |
| 207 | * Used to call the registered callback for a plugin screen. |
| 208 | * |
| 209 | * @internal |
| 210 | * @since 1.5.0 |
| 211 | */ |
| 212 | do_action( $page_hook ); |
| 213 | } else { |
| 214 | if ( validate_file($plugin_page) ) |
| 215 | wp_die(__('Invalid plugin page')); |
| 216 | |
| 217 | if ( !( file_exists(WP_PLUGIN_DIR . "/$plugin_page") && is_file(WP_PLUGIN_DIR . "/$plugin_page") ) && !( file_exists(WPMU_PLUGIN_DIR . "/$plugin_page") && is_file(WPMU_PLUGIN_DIR . "/$plugin_page") ) ) |
| 218 | wp_die(sprintf(__('Cannot load %s.'), htmlentities($plugin_page))); |
| 219 | |
| 220 | /** |
| 221 | * Fires before a particular screen is loaded. |