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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 |
|---|---|
| 39 | |
| 40 | /** |
| 41 | * Filters the file of an admin menu sub-menu item. |
| 42 | * |
| 43 | * @since 4.4.0 |
| 44 | * |
| 45 | * @param string $submenu_file The submenu file. |
| 46 | * @param string $parent_file The submenu item's parent file. |
| 47 | */ |
| 48 | $submenu_file = apply_filters( 'submenu_file', $submenu_file, $parent_file ); |
| 49 | |
| 50 | get_admin_page_parent(); |
| 51 | |
| 52 | /** |
| 53 | * Display menu. |
| 54 | * |
| 55 | * @access private |
| 56 | * @since 2.7.0 |
| 57 | * |