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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 |
|---|---|
| 336 | $classes[] = 'tag-' . sanitize_html_class($tag->slug, $tag->term_id); |
| 337 | } |
| 338 | |
| 339 | if ( !empty($class) ) { |
| 340 | if ( !is_array( $class ) ) |
| 341 | $class = preg_split('#\s+#', $class); |
| 342 | $classes = array_merge($classes, $class); |
| 343 | } |
| 344 | |
| 345 | return apply_filters('post_class', $classes, $class, $post_id); |
| 346 | } |
| 347 | |
| 348 | /** |
| 349 | * Display the classes for the body element. |
| 350 | * |
| 351 | * @since 2.8.0 |
| 352 | * |
| 353 | * @param string|array $class One or more classes to add to the class list. |
| 354 | */ |