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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 |
|---|---|
| 710 | |
| 711 | /** |
| 712 | * Filter the list of CSS body classes for the current post or page. |
| 713 | * |
| 714 | * @since 2.8.0 |
| 715 | * |
| 716 | * @param array $classes An array of body classes. |
| 717 | * @param string $class A comma-separated list of additional classes added to the body. |
| 718 | */ |
| 719 | $classes = apply_filters( 'body_class', $classes, $class ); |
| 720 | |
| 721 | return array_unique( $classes ); |
| 722 | } |
| 723 | |
| 724 | /** |
| 725 | * Whether post requires password and correct password has been provided. |
| 726 | * |
| 727 | * @since 2.7.0 |
| 728 | * |