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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 |
|---|---|
| 244 | * 3. The plugin basename minus the file extension. |
| 245 | * |
| 246 | * Together, the three parts form the `$page_hook`. Citing the example above, |
| 247 | * the hook name used would be 'settings_page_pluginbasename'. |
| 248 | * |
| 249 | * @see get_plugin_page_hook() |
| 250 | * |
| 251 | * @since 1.5.0 |
| 252 | */ |
| 253 | do_action( $page_hook ); |
| 254 | } else { |
| 255 | if ( validate_file( $plugin_page ) ) { |
| 256 | wp_die( __( 'Invalid plugin page.' ) ); |
| 257 | } |
| 258 | |
| 259 | if ( ! ( file_exists( WP_PLUGIN_DIR . "/$plugin_page" ) && is_file( WP_PLUGIN_DIR . "/$plugin_page" ) ) && ! ( file_exists( WPMU_PLUGIN_DIR . "/$plugin_page" ) && is_file( WPMU_PLUGIN_DIR . "/$plugin_page" ) ) ) { |
| 260 | wp_die( sprintf( __( 'Cannot load %s.' ), htmlentities( $plugin_page ) ) ); |
| 261 | } |
| 262 | |