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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 |
---|---|
23 | /** |
24 | * Filter the parent file of an admin menu sub-menu item. |
25 | * |
26 | * Allows plugins to move sub-menu items around. |
27 | * |
28 | * @since MU |
29 | * |
30 | * @param string $parent_file The parent file. |
31 | */ |
32 | $parent_file = apply_filters( 'parent_file', $parent_file ); |
33 |
|
34 | get_admin_page_parent(); |
35 |
|
36 | /** |
37 | * Display menu. |
38 | * |
39 | * @access private |
40 | * @since 2.7.0 |
41 | * |