kvprint named vprintf for PHP

/**
	* Allows "named" parameters for vprintf. You can use one of two ways to name the values
	* in the string. Mixing and matching in the same string is supported. 
	*
	* It also throws an error when you don't have a value in the array as expected.
	*
	* $a = array("lazy" => "z", "jmp" => "jumps", "qik" => "QUICK", "times" => 10.625);
	*
	* The following strings can all be used: %(name)s -- python || %name$s --php
	*
	* $b = 'The %(qik)s brown fox %(jmp)s over the la%(lazy)sy dog %(times)d times';
	* $c = 'The %qik$s brown fox %jmp$s over the la%lazy$\'z10sy dog %times$1.1f times';
	* $d = "The %qik\$s brown fox %(jmp)'.20s over the CRAZY dog %(times)1.2f times";
	*
	* @author Nika Jones
	*
	* @copyright 2010 Appcelerator Inc.
	*
	* Licensed under the terms of the Apache Public License
	* http://www.apache.org/licenses/LICENSE-2.0
	*
	*/
function kvprintf($_string, $_array)
{
	return vprintf(preg_replace("/%(?:(?<!\()(([\w-]+)\\$)|\(([\w-]+)\))([a-z0-9\.-\\\'\\\+]+)/e", "'%'.((is_bool(\\\$n=array_search('\\2\\3',unserialize('".serialize(array_keys($_array))."')))?user_error('kvprintf(): Missing argument \'\\2\\3\'',E_USER_WARNING):\\\$n)+1).'\$\\4';", $_string), array_values($_array));
}