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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 |
---|---|
739 |
|
740 | if ( ! isset( $show_admin_bar ) ) { |
741 | if ( ! is_user_logged_in() || 'wp-login.php' == $pagenow ) { |
742 | $show_admin_bar = false; |
743 | } else { |
744 | $show_admin_bar = _get_admin_bar_pref(); |
745 | } |
746 | } |
747 |
|
748 | $show_admin_bar = apply_filters( 'show_admin_bar', $show_admin_bar ); |
749 |
|
750 | return $show_admin_bar; |
751 | } |
752 |
|
753 | /** |
754 | * Retrieve the admin bar display preference of a user. |
755 | * |
756 | * @since 3.1.0 |
757 | * @access private |