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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 |
|---|---|
| 992 | * Filters whether to show the admin bar. |
| 993 | * |
| 994 | * Returning false to this hook is the recommended way to hide the admin bar. |
| 995 | * The user's display preference is used for logged in users. |
| 996 | * |
| 997 | * @since 3.1.0 |
| 998 | * |
| 999 | * @param bool $show_admin_bar Whether the admin bar should be shown. Default false. |
| 1000 | */ |
| 1001 | $show_admin_bar = apply_filters( 'show_admin_bar', $show_admin_bar ); |
| 1002 | |
| 1003 | return $show_admin_bar; |
| 1004 | } |
| 1005 | |
| 1006 | /** |
| 1007 | * Retrieve the admin bar display preference of a user. |
| 1008 | * |
| 1009 | * @since 3.1.0 |
| 1010 | * @access private |