apply_filters_ref_array() WP 1.0

Execute functions hooked on a specific filter hook, specifying arguments in an array.

No Hooks.

Return

Mixed. The filtered value after all hooked functions are applied to it.

Usage

apply_filters_ref_array( $tag, $args );

$tag(string) (required)

The name of the filter hook.

$args(array) (required)

The arguments supplied to the functions hooked to $tag.

Code of apply_filters_ref_array: wp-includes/plugin.php ^{VER 4.9.8}

<?php
function apply_filters_ref_array($tag, $args) {
	global $wp_filter, $wp_current_filter;

	// Do 'all' actions first
	if ( isset($wp_filter['all']) ) {
		$wp_current_filter[] = $tag;
		$all_args = func_get_args();
		_wp_call_all_hook($all_args);
	}

	if ( !isset($wp_filter[$tag]) ) {
		if ( isset($wp_filter['all']) )
			array_pop($wp_current_filter);
		return $args[0];
	}

	if ( !isset($wp_filter['all']) )
		$wp_current_filter[] = $tag;

	$filtered = $wp_filter[ $tag ]->apply_filters( $args[0], $args );

	array_pop( $wp_current_filter );

	return $filtered;
}

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