$a = 1; $b = 2; list($a,$b) = array_values([$b,$a]); echo $a,$b;
2019-08-061个赞
function check_ip($str){ if (!$arr = explode('.',$str)) return 0; if (count($arr) !== 4) return 0; foreach ($arr as $item) { if ($item<0 || $item>255) return 0; } return 1; } $ip = '192.168.1.-1'; echo check_ip($ip);
2019-08-060个赞
