Remove all the numbers from the variable string in PHP

On 02.10.12, In php, by Samuel east
Remove all the numbers from the variable string in PHP function
function remove_numbers($string) {
  		$vowels = array("1", "2", "3", "4", "5", "6", "7", "8", "9", "0", " ");
  		$string = str_replace($vowels, ' ', $string);
  		return $string;
}