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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 |
|---|---|
| 769 | |
| 770 | /** |
| 771 | * Filters the list of CSS body classes for the current post or page. |
| 772 | * |
| 773 | * @since 2.8.0 |
| 774 | * |
| 775 | * @param array $classes An array of body classes. |
| 776 | * @param array $class An array of additional classes added to the body. |
| 777 | */ |
| 778 | $classes = apply_filters( 'body_class', $classes, $class ); |
| 779 | |
| 780 | return array_unique( $classes ); |
| 781 | } |
| 782 | |
| 783 | /** |
| 784 | * Whether post requires password and correct password has been provided. |
| 785 | * |
| 786 | * @since 2.7.0 |
| 787 | * |