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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 |
|---|---|
| 728 | |
| 729 | /** |
| 730 | * Filter the list of CSS body classes for the current post or page. |
| 731 | * |
| 732 | * @since 2.8.0 |
| 733 | * |
| 734 | * @param array $classes An array of body classes. |
| 735 | * @param array $class An array of additional classes added to the body. |
| 736 | */ |
| 737 | $classes = apply_filters( 'body_class', $classes, $class ); |
| 738 | |
| 739 | return array_unique( $classes ); |
| 740 | } |
| 741 | |
| 742 | /** |
| 743 | * Whether post requires password and correct password has been provided. |
| 744 | * |
| 745 | * @since 2.7.0 |
| 746 | * |