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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 |
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531 |
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532 | if ( !empty( $class ) ) { |
533 | if ( !is_array( $class ) ) |
534 | $class = preg_split( '#\s+#', $class ); |
535 | $classes = array_merge( $classes, $class ); |
536 | } |
537 |
|
538 | $classes = array_map( 'esc_attr', $classes ); |
539 |
|
540 | return apply_filters( 'body_class', $classes, $class ); |
541 | } |
542 |
|
543 | /** |
544 | * Whether post requires password and correct password has been provided. |
545 | * |
546 | * @since 2.7.0 |
547 | * |
548 | * @param int|object $post An optional post. Global $post used if not provided. |
549 | * @return bool false if a password is not required or the correct password cookie is present, true otherwise. |