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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 |
|---|---|
| 649 | |
| 650 | /** |
| 651 | * Filter the list of CSS body classes for the current post or page. |
| 652 | * |
| 653 | * @since 2.8.0 |
| 654 | * |
| 655 | * @param array $classes An array of body classes. |
| 656 | * @param string $class A comma-separated list of additional classes added to the body. |
| 657 | */ |
| 658 | return apply_filters( 'body_class', $classes, $class ); |
| 659 | } |
| 660 | |
| 661 | /** |
| 662 | * Whether post requires password and correct password has been provided. |
| 663 | * |
| 664 | * @since 2.7.0 |
| 665 | * |
| 666 | * @param int|WP_Post $post An optional post. Global $post used if not provided. |
| 667 | * @return bool false if a password is not required or the correct password cookie is present, true otherwise. |