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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 |
---|---|
564 | /** |
565 | * Filter the arguments for the Categories widget drop-down. |
566 | * |
567 | * @since 2.8.0 |
568 | * |
569 | * @see wp_dropdown_categories() |
570 | * |
571 | * @param array $cat_args An array of Categories widget drop-down arguments. |
572 | */ |
573 | wp_dropdown_categories( apply_filters( 'widget_categories_dropdown_args', $cat_args ) ); |
574 | ?> |
575 |
|
576 | <script type='text/javascript'> |
577 | /* <![CDATA[ */ |
578 | var dropdown = document.getElementById("cat"); |
579 | function onCatChange() { |
580 | if ( dropdown.options[dropdown.selectedIndex].value > 0 ) { |
581 | location.href = "<?php echo home_url(); ?>/?cat="+dropdown.options[dropdown.selectedIndex].value; |
582 | } |