apply_filters_ref_array()函数是Wordpress函数

apply_filters_ref_array()函数是Wordpress函数，调用已添加到筛选器挂钩的回调函数，并在数组中指定参数。

apply_filters_ref_array( string $tag, array $args )

说明（Description）

另见函数 apply_filters()

参数（Parameters）

返回（Return）

（mixed）应用所有挂接函数后的过滤值。

源码（Source）

/**
 * Execute functions hooked on a specific filter hook, specifying arguments in an array.
 *
 * @see 3.0.0
 *
 * @see apply_filters() This function is identical, but the arguments passed to the
 * functions hooked to `$tag` are supplied using an array.
 *
 * @global array $wp_filter         Stores all of the filters
 * @global array $merged_filters    Merges the filter hooks using this function.
 * @global array $wp_current_filter Stores the list of current filters with the current one last
 *
 * @param string $tag  The name of the filter hook.
 * @param array  $args The arguments supplied to the functions hooked to $tag.
 * @return mixed The filtered value after all hooked functions are applied to it.
 */
function apply_filters_ref_array($tag, $args) {
	global $wp_filter, $merged_filters, $wp_current_filter;
	// Do 'all' actions first
	if ( isset($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;
	// Sort
	if ( !isset( $merged_filters[ $tag ] ) ) {
		ksort($wp_filter[$tag]);
		$merged_filters[ $tag ] = true;
	}
	reset( $wp_filter[ $tag ] );
	do {
		foreach( (array) current($wp_filter[$tag]) as $the_ )
			if ( !is_null($the_['function']) )
				$args[0] = call_user_func_array($the_['function'], array_slice($args, 0, (int) $the_['accepted_args']));
	} while ( next($wp_filter[$tag]) !== false );
	array_pop( $wp_current_filter );
	return $args[0];
}

笔记（Notes）

例子
注意
从PHP 5.4开始，数组不再通过引用传递