ต้องการฝั่ง log file ไว้ใน web services ควรทำยังไง

							function logIP(){
								function get_ip()
													{
										 $ipaddress = '';
										 if ($_SERVER['HTTP_CLIENT_IP'])
											 $ipaddress = $_SERVER['HTTP_CLIENT_IP'];
										 else if($_SERVER['HTTP_X_FORWARDED_FOR'])
											 $ipaddress = $_SERVER['HTTP_X_FORWARDED_FOR'];
										 else if($_SERVER['HTTP_X_FORWARDED'])
											 $ipaddress = $_SERVER['HTTP_X_FORWARDED'];
										 else if($_SERVER['HTTP_FORWARDED_FOR'])
											 $ipaddress = $_SERVER['HTTP_FORWARDED_FOR'];
										 else if($_SERVER['HTTP_FORWARDED'])
											 $ipaddress = $_SERVER['HTTP_FORWARDED'];
										 else if($_SERVER['REMOTE_ADDR'])
											 $ipaddress = $_SERVER['REMOTE_ADDR'];
										 else
											 $ipaddress = 'UNKNOWN';
									
										 return $ipaddress; 
											}
											$ip = "CLIENT_IP :: ".get_ip()." "; //IP CLIENT
											date_default_timezone_set('Asia/Bangkok');
											//$event = $txt_name."  ".$txt_surname." praphat  ".$dep_name." "; //
											$log_date  =       "DATETIME :: ".date('Y-m-d H:i:s') ." "; //datetime
											$query_str =	   "QUERY_STR :: ".$_SERVER["QUERY_STRING"]."\r\n"; //query_str
											$ip_server=		"SERVER_IP :: ".$_SERVER['SERVER_NAME']." "; //IP_SERVER
											$URL="URL:: ".$_SERVER["PHP_SELF"]." ";
												/*
						$sql2="insert into log (log_ip,log_event,log_date) values ('$ip','$event','$log_date')";
											$query2 = mysql_query($sql2);
																*/		
											$strFileName = "../log/$_SERVER[PHP_SELF].log.txt";
											
											$objFopen = fopen($strFileName, 'a');
											fwrite($objFopen, $log_date);
											fwrite($objFopen,$ip);
											//fwrite($objFopen, $event);
											fwrite($objFopen, $ip_server);
											fwrite($objFopen, $URL);
											fwrite($objFopen, $query_str);
											//
											
										
											fclose($objFopen);
					}
?>

include('logFunction.php');
		 $Log = logIP();//fonction Log