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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 |
|---|---|
| 349 | |
| 350 | if ( !empty($class) ) { |
| 351 | if ( !is_array( $class ) ) |
| 352 | $class = preg_split('#\s+#', $class); |
| 353 | $classes = array_merge($classes, $class); |
| 354 | } |
| 355 | |
| 356 | $classes = array_map('esc_attr', $classes); |
| 357 | |
| 358 | return apply_filters('comment_class', $classes, $class, $comment_id, $post_id); |
| 359 | } |
| 360 | |
| 361 | /** |
| 362 | * Retrieve the comment date of the current comment. |
| 363 | * |
| 364 | * @since 1.5.0 |
| 365 | * @uses apply_filters() Calls 'get_comment_date' hook with the formatted date and the $d parameter respectively |
| 366 | * @uses $comment |
| 367 | * |