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PHP checks whether the IP is legal

不言
不言Original
2018-04-26 10:03:452184browse

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No regular judgment is used, just a function written in PHP to verify whether the IP address is legal

function checkIp($ip){
    $arr=explode(&#39;.&#39;,$ip);

    if(count($arr) != 4){

        return false;

    }else{

        for($i = 0;$i < 4;$i++){

            if(($arr[$i] <&#39;0&#39;) || ($arr[$i] > &#39;255&#39;)){

                return false;

            }

        }

    }

    return true;

}

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