php WEBSOCKET问题

<?php    // Usage: $master=new WebSocket("localhost",12345);      class WebSocket{        var $master;        var $sockets = array();        var $users   = array();        var $debug   = false;               function __construct($address,$port){          error_reporting(E_ALL);          set_time_limit(0);          ob_implicit_flush();          $this->master=socket_create(AF_INET, SOCK_STREAM, SOL_TCP)     or die("socket_create() failed");          socket_set_option($this->master, SOL_SOCKET, SO_REUSEADDR, 1)  or die("socket_option() failed");          socket_bind($this->master, $address, $port)                    or die("socket_bind() failed");          socket_listen($this->master,20)                                or die("socket_listen() failed");          $this->sockets[] = $this->master;          $this->say("Server Started : ".date('Y-m-d H:i:s'));          $this->say("Listening on   : ".$address." port ".$port);          $this->say("Master socket  : ".$this->master."/n");          while(true){            $changed = $this->sockets;            socket_select($changed,$write=NULL,$except=NULL,NULL);            foreach($changed as $socket){              if($socket==$this->master){                $client=socket_accept($this->master);                if($client<0){ $this->log("socket_accept() failed"); continue; }                else{ $this->connect($client); }              }              else{                $bytes = @socket_recv($socket,$buffer,2048,0);                if($bytes==0){ $this->disconnect($socket); }                else{                  $user = $this->getuserbysocket($socket);                  if(!$user->handshake){ $this->dohandshake($user,$buffer); }                  else{ $this->process($user,$this->unwrap($buffer)); }                }              }            }          }        }        function process($user,$msg){          /* Extend and modify this method to suit your needs */          /* Basic usage is to echo incoming messages back to client */          $this->send($user->socket,$msg);        }        function send($client,$msg){          $this->say("> ".$msg);          $msg = $this->wrap($msg);          socket_write($client,$msg,strlen($msg));          $this->say("! ".strlen($msg));        }        function connect($socket){          $user = new User();          $user->id = uniqid();          $user->socket = $socket;          array_push($this->users,$user);          array_push($this->sockets,$socket);          $this->log($socket." CONNECTED!");          $this->log(date("d/n/Y ")."at ".date("H:i:s T"));        }        function disconnect($socket){          $found=null;          $n=count($this->users);          for($i=0;$i<$n;$i++){            if($this->users[$i]->socket==$socket){ $found=$i; break; }          }          if(!is_null($found)){ array_splice($this->users,$found,1); }          $index=array_search($socket,$this->sockets);          socket_close($socket);          $this->log($socket." DISCONNECTED!");          if($index>=0){ array_splice($this->sockets,$index,1); }        }        function dohandshake($user,$buffer){          $this->log("/nRequesting handshake...");          $this->log($buffer);          list($resource,$host,$origin,$key1,$key2,$l8b) = $this->getheaders($buffer);          $this->log("Handshaking...");          //$port = explode(":",$host);          //$port = $port[1];          //$this->log($origin."/r/n".$host);          $upgrade  = "HTTP/1.1 101 WebSocket Protocol Handshake/r/n" .                      "Upgrade: WebSocket/r/n" .                      "Connection: Upgrade/r/n" .                                      //"WebSocket-Origin: " . $origin . "/r/n" .                                      //"WebSocket-Location: ws://" . $host . $resource . "/r/n" .                      "Sec-WebSocket-Origin: " . $origin . "/r/n" .                          "Sec-WebSocket-Location: ws://" . $host . $resource . "/r/n" .                          //"Sec-WebSocket-Protocol: icbmgame/r/n" . //Client doesn't send this                      "/r/n" .                          $this->calcKey($key1,$key2,$l8b) . "/r/n";// .                              //"/r/n";          socket_write($user->socket,$upgrade.chr(0),strlen($upgrade.chr(0)));          $user->handshake=true;          $this->log($upgrade);          $this->log("Done handshaking...");          return true;        }               function calcKey($key1,$key2,$l8b){              //Get the numbers              preg_match_all('/([/d]+)/', $key1, $key1_num);              preg_match_all('/([/d]+)/', $key2, $key2_num);              //Number crunching [/bad pun]              $this->log("Key1: " . $key1_num = implode($key1_num[0]) );              $this->log("Key2: " . $key2_num = implode($key2_num[0]) );              //Count spaces              preg_match_all('/([ ]+)/', $key1, $key1_spc);              preg_match_all('/([ ]+)/', $key2, $key2_spc);              //How many spaces did it find?              $this->log("Key1 Spaces: " . $key1_spc = strlen(implode($key1_spc[0])) );              $this->log("Key2 Spaces: " . $key2_spc = strlen(implode($key2_spc[0])) );              if($key1_spc==0|$key2_spc==0){ $this->log("Invalid key");return; }              //Some math              $key1_sec = pack("N",$key1_num / $key1_spc); //Get the 32bit secret key, minus the other thing              $key2_sec = pack("N",$key2_num / $key2_spc);              //This needs checking, I'm not completely sure it should be a binary string              return md5($key1_sec.$key2_sec.$l8b,1); //The result, I think        }               function getheaders($req){          $r=$h=$o=null;          if(preg_match("/GET (.*) HTTP/"               ,$req,$match)){ $r=$match[1]; }          if(preg_match("/Host: (.*)/r/n/"              ,$req,$match)){ $h=$match[1]; }          if(preg_match("/Origin: (.*)/r/n/"            ,$req,$match)){ $o=$match[1]; }          if(preg_match("/Sec-WebSocket-Key1: (.*)/r/n/",$req,$match)){ $this->log("Sec Key1: ".$sk1=$match[1]); }          if(preg_match("/Sec-WebSocket-Key2: (.*)/r/n/",$req,$match)){ $this->log("Sec Key2: ".$sk2=$match[1]); }          if($match=substr($req,-8))                                                                  { $this->log("Last 8 bytes: ".$l8b=$match); }          return array($r,$h,$o,$sk1,$sk2,$l8b);        }        function getuserbysocket($socket){          $found=null;          foreach($this->users as $user){            if($user->socket==$socket){ $found=$user; break; }          }          return $found;        }        function     say($msg=""){ echo $msg."/n"; }        function     log($msg=""){ if($this->debug){ echo $msg."/n"; } }        function    wrap($msg=""){ return chr(0).$msg.chr(255); }        function  unwrap($msg=""){ return substr($msg,1,strlen($msg)-2); }      }      class User{        var $id;        var $socket;        var $handshake;      }    ?>

<?php       // Run from command prompt > php -q chatbot.demo.php      include "ewq.php";      // Extended basic WebSocket as ChatBot      class ChatBot extends WebSocket{          function process($user,$msg){                            if (isset($user->first)) {                  $this->send($user->socket,'');                  $user->first = true;              }                             $this->say("< ".$msg);              switch($msg){                case "hello" : $this->send($user->socket,"hello human");                       break;                case "hi"    : $this->send($user->socket,"zup human");                         break;                case "name"  : $this->send($user->socket,"my name is Multivac, silly I know"); break;                case "age"   : $this->send($user->socket,"I am older than time itself");       break;                case "date"  : $this->send($user->socket,"today is ".date("Y.m.d"));           break;                case "time"  : $this->send($user->socket,"server time is ".date("H:i:s"));     break;                case "thanks": $this->send($user->socket,"you're welcome");                    break;                case "bye"   : $this->send($user->socket,"bye");                               break;                //default      : $this->send($user->socket,$msg." not understood");              break;                default      : $this->sendAll($user, $msg);              break;              }          }          function sendAll($currentUser, $msg){              $usersList = $this->users;              foreach ($usersList as $user){                if ($user !== $currentUser) // 自己发送的消息就不再接收一次了                  $this->send($user->socket, $msg);              }          }      }      $master = new ChatBot("127.0.0.1",10035);    ?>

为什么我 终端PHP ss.php 会报错

Warning: date(): It is not safe to rely on the system's timezone settings. You are *required* to use the date.timezone setting or the date_default_timezone_set() function. In case you used any of those methods and you are still getting this warning, you most likely misspelled the timezone identifier. We selected the timezone 'UTC' for now, but please set date.timezone to select your timezone. in /Applications/XAMPP/xamppfiles/htdocs/socket/ewq.php on line 18
Server Started : 2014-07-17 05:18:18/nListening on : 127.0.0.1 port 10035/nMaster socket : Resource id #5/n/n

回复讨论(解决方案)

这是由于调用date时，若timezone设置不正确所产生的E_NOTICE|E_WARNING错误

有以下几种方案可解决该问题：

使用date_default_timezone_set()设置 date_default_timezone_set('PRC');
ini_set('date.timezone','Asia/Shanghai');
修改错误级别配置（不推荐）
修改php.ini，显式设置date.timezone=PRC

没有设置时区，设一下就好了

在代码的开始部分加上时区设置：
date_default_timezone_set('PRC'); //设置中国时区

date_default_timezone_set("Asia/Hong_Kong");

Strict Standards: Only variables should be passed by reference in /Applications/XAMPP/xamppfiles/htdocs/socket/websocket.class.php on line 22

Strict Standards: Only variables should be passed by reference in /Applications/XAMPP/xamppfiles/htdocs/socket/websocket.class.php on line 22
现在又报这个错