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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 |
|---|---|
| 398 | |
| 399 | $lastorder = $order; |
| 400 | } |
| 401 | |
| 402 | return apply_filters( 'add_menu_classes', $menu ); |
| 403 | } |
| 404 | |
| 405 | uksort($menu, "strnatcasecmp"); // make it all pretty |
| 406 | |
| 407 | if ( apply_filters('custom_menu_order', false) ) { |
| 408 | $menu_order = array(); |
| 409 | foreach ( $menu as $menu_item ) { |
| 410 | $menu_order[] = $menu_item[2]; |
| 411 | } |
| 412 | unset($menu_item); |
| 413 | $default_menu_order = $menu_order; |
| 414 | $menu_order = apply_filters('menu_order', $menu_order); |
| 415 | $menu_order = array_flip($menu_order); |
| 416 | $default_menu_order = array_flip($default_menu_order); |