php判断访问IP的方法_PHP教程

php判断访问IP的方法

 这篇文章主要介绍了php判断访问IP的方法,涉及php针对服务器端预定义变量$_SERVER的相关判断与使用技巧,需要的朋友可以参考下

 

 

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;  }  ?>
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;  }  ?>
  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;  }  ?>
    $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;  }  ?>
  } 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;  }  ?>
    $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;  }  ?>
  } 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;  }  ?>
    $cip = $_SERVER ["REMOTE_ADDR"];    } else {      $cip = '';    }    preg_match ( "/[\d\.]{7,15}/", $cip, $cips );    $cip = isset ( $cips [0] ) ? $cips [0] : 'unknown';    unset ( $cips );    return $cip;  }  ?>
  } else {      $cip = '';    }    preg_match ( "/[\d\.]{7,15}/", $cip, $cips );    $cip = isset ( $cips [0] ) ? $cips [0] : 'unknown';    unset ( $cips );    return $cip;  }  ?>
    $cip = '';    }    preg_match ( "/[\d\.]{7,15}/", $cip, $cips );    $cip = isset ( $cips [0] ) ? $cips [0] : 'unknown';    unset ( $cips );    return $cip;  }  ?>
  }    preg_match ( "/[\d\.]{7,15}/", $cip, $cips );    $cip = isset ( $cips [0] ) ? $cips [0] : 'unknown';    unset ( $cips );    return $cip;  }  ?>
  preg_match ( "/[\d\.]{7,15}/", $cip, $cips );    $cip = isset ( $cips [0] ) ? $cips [0] : 'unknown';    unset ( $cips );    return $cip;  }  ?>
  $cip = isset ( $cips [0] ) ? $cips [0] : 'unknown';    unset ( $cips );    return $cip;  }  ?>
  unset ( $cips );    return $cip;  }  ?>
  return $cip;  }  ?>
}  ?>
?>