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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 |
|---|---|
| 457 | /** |
| 458 | * Filter the list of CSS classes for the current post. |
| 459 | * |
| 460 | * @since 2.7.0 |
| 461 | * |
| 462 | * @param array $classes An array of post classes. |
| 463 | * @param string $class A comma-separated list of additional classes added to the post. |
| 464 | * @param int $post_id The post ID. |
| 465 | */ |
| 466 | return apply_filters( 'post_class', $classes, $class, $post->ID ); |
| 467 | } |
| 468 | |
| 469 | /** |
| 470 | * Display the classes for the body element. |
| 471 | * |
| 472 | * @since 2.8.0 |
| 473 | * |
| 474 | * @param string|array $class One or more classes to add to the class list. |
| 475 | */ |