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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 |
|---|---|
| 227 | if (! isset($_GET['noheader'])) |
| 228 | require_once(ABSPATH . 'wp-admin/admin-header.php'); |
| 229 | |
| 230 | /** |
| 231 | * Used to call the registered callback for a plugin screen. |
| 232 | * |
| 233 | * @ignore |
| 234 | * @since 1.5.0 |
| 235 | */ |
| 236 | do_action( $page_hook ); |
| 237 | } else { |
| 238 | if ( validate_file($plugin_page) ) |
| 239 | wp_die(__('Invalid plugin page')); |
| 240 | |
| 241 | 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") ) ) |
| 242 | wp_die(sprintf(__('Cannot load %s.'), htmlentities($plugin_page))); |
| 243 | |
| 244 | /** |
| 245 | * Fires before a particular screen is loaded. |