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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 |
|---|---|
| 823 | * Filter whether to show the admin bar. |
| 824 | * |
| 825 | * Returning false to this hook is the recommended way to hide the admin bar. |
| 826 | * The user's display preference is used for logged in users. |
| 827 | * |
| 828 | * @since 3.1.0 |
| 829 | * |
| 830 | * @param bool $show_admin_bar Whether the admin bar should be shown. Default false. |
| 831 | */ |
| 832 | $show_admin_bar = apply_filters( 'show_admin_bar', $show_admin_bar ); |
| 833 | |
| 834 | return $show_admin_bar; |
| 835 | } |
| 836 | |
| 837 | /** |
| 838 | * Retrieve the admin bar display preference of a user. |
| 839 | * |
| 840 | * @since 3.1.0 |
| 841 | * @access private |