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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 |
|---|---|
| 897 | * Filter whether to show the admin bar. |
| 898 | * |
| 899 | * Returning false to this hook is the recommended way to hide the admin bar. |
| 900 | * The user's display preference is used for logged in users. |
| 901 | * |
| 902 | * @since 3.1.0 |
| 903 | * |
| 904 | * @param bool $show_admin_bar Whether the admin bar should be shown. Default false. |
| 905 | */ |
| 906 | $show_admin_bar = apply_filters( 'show_admin_bar', $show_admin_bar ); |
| 907 | |
| 908 | return $show_admin_bar; |
| 909 | } |
| 910 | |
| 911 | /** |
| 912 | * Retrieve the admin bar display preference of a user. |
| 913 | * |
| 914 | * @since 3.1.0 |
| 915 | * @access private |