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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 |
|---|---|
| 329 | $classes[] = 'tag-' . $tag->slug; |
| 330 | } |
| 331 | |
| 332 | if ( !empty($class) ) { |
| 333 | if ( !is_array( $class ) ) |
| 334 | $class = preg_split('#\s+#', $class); |
| 335 | $classes = array_merge($classes, $class); |
| 336 | } |
| 337 | |
| 338 | return apply_filters('post_class', $classes, $class, $post_id); |
| 339 | } |
| 340 | |
| 341 | /** |
| 342 | * Whether post requires password and correct password has been provided. |
| 343 | * |
| 344 | * @since 2.7.0 |
| 345 | * |
| 346 | * @param int|object $post An optional post. Global $post used if not provided. |
| 347 | * @return bool false if a password is not required or the correct password cookie is present, true otherwise. |