php記錄訪問者IP地址的代碼

//檔案名稱字 $filename = "ip.txt"; if (isset($_SERVER['HTTP_CLIENT_IP'])) { $clientip = $_SERVER['HTTP_CLIENT_IP']; }elseif (isset($_SERVER['HTTP_X_FORWARD_FOR'])) { $clientip = $_SERVER['HTTP_X_FORWARD_FOR']; }else { $clientip = $_SERVER['REMOTE_ADDR']; } //開啟檔案（檔案不存在自動建立） if (!$fp = fopen($filename, "a+")) { echo "不能開啟檔案$"; exit; } //寫入的時候還判斷是否已經有重複資料 while(!feof($fp)) { $line = fgets($fp); if($line == ($clientip."\n")) { exit; //有重複資料就退出； } } // 寫入檔案 if(!fwrite($fp,$clientip."\n")) { echo "不能寫入到檔案$filename" ; exit; } //已經完成寫入檔案 fclose($fp); ?> 複製代碼

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