php判断访问IP的方法


            本文实例讲述了php判断访问IP的方法。分享给大家供大家参考。具体如下：





<?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; 

} 

?>







希望本文所述对大家的php程序设计有所帮助。