php 5.4中新增加对session状态判断的效能

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Release: 2016-06-13 12:34:00
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php 5.4中新增加对session状态判断的功能
  在以前的php 版本中,要判断session是否有效,只能用如下的方法:


session_start();
  
  if(isset($_SESSION))
  { 
    echo "Started";
  }
  else
  {
    echo "Not Started";
  }
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而在php 5.4(即将发行)中,对session的状态进行了细分,可以用如下的方法判断:
session_start();
  
  $status = session_status();
  
  if($status == PHP_SESSION_DISABLED)
  {
    echo "Session is Disabled";
  }
  else if($status == PHP_SESSION_NONE )
  {
    echo "Session Enabled but No Session values Created";
  }
  else
  {
    echo "Session Enabled and Session values Created";
  }
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  可以看到,通过使用session_status()返回的是一个int类型的值,表示出session的各种状态,比如禁止(PHP_SESSION_DISABLED ),session还不存在
(PHP_SESSION_NONE)
,或者session已经被建立起来了(PHP_SESSION_ACTIVE)

1 楼 lijichao 2012-02-20  
 php 5.4中新增加对session状态判断的效能

2 楼 mailangel123 2012-02-21  
这个可以有。

3 楼 mailangel123 2012-02-21  
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