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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 |
|---|---|
| 671 | |
| 672 | /** |
| 673 | * Filter the list of CSS body classes for the current post or page. |
| 674 | * |
| 675 | * @since 2.8.0 |
| 676 | * |
| 677 | * @param array $classes An array of body classes. |
| 678 | * @param string $class A comma-separated list of additional classes added to the body. |
| 679 | */ |
| 680 | $classes = apply_filters( 'body_class', $classes, $class ); |
| 681 | |
| 682 | return array_unique( $classes ); |
| 683 | } |
| 684 | |
| 685 | /** |
| 686 | * Whether post requires password and correct password has been provided. |
| 687 | * |
| 688 | * @since 2.7.0 |
| 689 | * |