How to verify IP legitimacy with PHP

This article mainly introduces how to verify the legality of IP with PHP, which has certain reference value. Now I share it with you. Friends in need can refer to it

php verifies the legality of IP sex!

function get_ip(){ //判断服务器是否允许$_SERVER if(isset($_SERVER)){ if(isset($_SERVER[HTTP_X_FORWARDED_FOR])){ $realip = $_SERVER[HTTP_X_FORWARDED_FOR]; }elseif(isset($_SERVER[HTTP_CLIENT_IP])) { $realip = $_SERVER[HTTP_CLIENT_IP]; }else{ $realip = $_SERVER[REMOTE_ADDR]; } }else{ //不允许就使用getenv获取 if(getenv("HTTP_X_FORWARDED_FOR")){ $realip = getenv( "HTTP_X_FORWARDED_FOR"); }elseif(getenv("HTTP_CLIENT_IP")) { $realip = getenv("HTTP_CLIENT_IP"); }else{ $realip = getenv("REMOTE_ADDR"); } } return $realip; }

The above examples can be used in the interface! Add IP verification mechanism!

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