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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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535 |
|
536 | /** |
537 | * Filter the HTML output of a taxonomy list. |
538 | * |
539 | * @since 2.1.0 |
540 | * |
541 | * @param string $output HTML output. |
542 | * @param array $args An array of taxonomy-listing arguments. |
543 | */ |
544 | $output = apply_filters( 'wp_list_categories', $output, $args ); |
545 |
|
546 | if ( $echo ) |
547 | echo $output; |
548 | else |
549 | return $output; |
550 | } |
551 |
|
552 | /** |
553 | * Display tag cloud. |