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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 |
---|---|
1226 | if ( ! empty( $_POST['item-object'] ) && isset( $items[$_POST['item-object']] ) ) { |
1227 | $menus_meta_box_object = $items[ $_POST['item-object'] ]; |
1228 | /** |
1229 | * Filter a nav menu meta box object. |
1230 | * |
1231 | * @since 3.0.0 |
1232 | * |
1233 | * @param object $menus_meta_box_object A nav menu meta box object, such as Page, Post, Category, Tag, etc. |
1234 | */ |
1235 | $item = apply_filters( 'nav_menu_meta_box_object', $menus_meta_box_object ); |
1236 | ob_start(); |
1237 | call_user_func_array($callback, array( |
1238 | null, |
1239 | array( |
1240 | 'id' => 'add-' . $item->name, |
1241 | 'title' => $item->labels->name, |
1242 | 'callback' => $callback, |
1243 | 'args' => $item, |
1244 | ) |