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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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476 | } |
477 | /** |
478 | * Filters the taxonomy drop-down output. |
479 | * |
480 | * @since 2.1.0 |
481 | * |
482 | * @param string $output HTML output. |
483 | * @param array $r Arguments used to build the drop-down. |
484 | */ |
485 | $output = apply_filters( 'wp_dropdown_cats', $output, $r ); |
486 |
|
487 | if ( $r['echo'] ) { |
488 | echo $output; |
489 | } |
490 | return $output; |
491 | } |
492 |
|
493 | /** |
494 | * Display or retrieve the HTML list of categories. |