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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 |
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834 |
|
835 | /** |
836 | * Filters the list of CSS body class names for the current post or page. |
837 | * |
838 | * @since 2.8.0 |
839 | * |
840 | * @param string[] $classes An array of body class names. |
841 | * @param string[] $class An array of additional class names added to the body. |
842 | */ |
843 | $classes = apply_filters( 'body_class', $classes, $class ); |
844 |
|
845 | return array_unique( $classes ); |
846 | } |
847 |
|
848 | /** |
849 | * Whether post requires password and correct password has been provided. |
850 | * |
851 | * @since 2.7.0 |
852 | * |