php: sprintf use array

sprintf with array

/**
 * sprintf use array
 *
 * @see http://jp.php.net/manual/ja/function.printf.php
 * @param string $format 
 * @param array $arr 
 * @access public
 * @return string
 */
function sprintf_array( $format, $arr ) {
    return call_user_func_array( 'sprintf', array_merge( (array) $format, $arr ) );
}