php判斷訪問IP的方法_php技巧

本文執行個體講述了php判斷訪問IP的方法。分享給大家供大家參考。具體如下：

<?php function getIP() {   if (! empty ( $_SERVER ["HTTP_CLIENT_IP"] )) {     $cip = $_SERVER ["HTTP_CLIENT_IP"];   } else if (! empty ( $_SERVER ["HTTP_X_FORWARDED_FOR"] )) {     $cip = $_SERVER ["HTTP_X_FORWARDED_FOR"];   } else if (! empty ( $_SERVER ["REMOTE_ADDR"] )) {     $cip = $_SERVER ["REMOTE_ADDR"];   } else {     $cip = '';   }   preg_match ( "/[\d\.]{7,15}/", $cip, $cips );   $cip = isset ( $cips [0] ) ? $cips [0] : 'unknown';   unset ( $cips );   return $cip; } ?>

希望本文所述對大家的php程式設計有所協助。