DZX1.5 random number function random sharing

DZX1.5 随机数

/**
 * @param int $length: Random number length
 * @param int $numeric: 0 or non-0, where 0 means the random number consists of all numbers, non-0 means the random number consists of all letters
 * @return string: Return Generated random numbers
*/
function random($length, $numeric = 0) {
	$seed = base_convert(md5(microtime().$_SERVER['DOCUMENT_ROOT']), 16, $numeric ? 10 : 35);
	$seed = $numeric ? (str_replace('0', '', $seed).'012340567890') : ($seed.'zZ'.strtoupper($seed));
	$hash = '';
	$max = strlen($seed) - 1;
	for($i = 0; $i < $length; $i++) {
		$hash .= $seed{mt_rand(0, $max)};
	}
	return $hash;
}
echo random('15',1);
echo '';
echo random('15');
/*End of php*/