Refactoring WordPress apply_filters Callback Loops for readability

apply_filters.php

function apply_filters( $tag, $value ) {
  // removed for brevity....

//	foreach ( (array) $wp_filter[ $tag ] as $priority_level => $callbacks ) {
//		$value = call_event_callbacks_for_this_priority( $callbacks, $args, $value );
//	}


	do {
		$callbacks = current( $wp_filter[ $tag ] );
		
		foreach ( (array) $callbacks as $the_ ) {
			if ( ! is_null( $the_['function'] ) ) {
				$args[1] = $value;
				$value   = call_user_func_array( $the_['function'], array_slice( $args, 1, (int) $the_['accepted_args'] ) );
			}
		}

	} while ( next($wp_filter[$tag]) !== false );

	array_pop( $wp_current_filter );

	return $value;
}

function call_event_callbacks_for_this_priority( $callbacks, $args, $value ) {
	foreach ( (array) $callbacks as $the_ ) {
		if ( is_null( $the_['function'] ) ) {
			continue;
		}

		$args[1]            = $value;
		$callback_arguments = array_slice( $args, 1, (int) $the_['accepted_args'] );
		
		$value = call_user_func_array( $the_['function'], $callback_arguments );
	}

	return $value;
}