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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 |
|---|---|
| 557 | $class = preg_split( '#\s+#', $class ); |
| 558 | $classes = array_merge( $classes, $class ); |
| 559 | } else { |
| 560 | // Ensure that we always coerce class to being an array. |
| 561 | $class = array(); |
| 562 | } |
| 563 | |
| 564 | $classes = array_map( 'esc_attr', $classes ); |
| 565 | |
| 566 | return apply_filters( 'body_class', $classes, $class ); |
| 567 | } |
| 568 | |
| 569 | /** |
| 570 | * Whether post requires password and correct password has been provided. |
| 571 | * |
| 572 | * @since 2.7.0 |
| 573 | * |
| 574 | * @param int|WP_Post $post An optional post. Global $post used if not provided. |
| 575 | * @return bool false if a password is not required or the correct password cookie is present, true otherwise. |