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php 5.4中新增多对session状态判断的功能

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Release： 2016-06-13 13:16:28
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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:?

Java代码? ?收藏代码
  1. session_start();??
  2. ????
  3. ??if(isset($_SESSION))??
  4. ??{???
  5. ????echo?"Started";??
  6. ??}??
  7. ??else??
  8. ??{??
  9. ????echo?"Not?Started";??
  10. ??}??



?? 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:?

Java代码? ?收藏代码
  1. session_start();??
  2. ????
  3. ??$status?=?session_status();??
  4. ????
  5. ??if($status?==?PHP_SESSION_DISABLED)??
  6. ??{??
  7. ????echo?"Session?is?Disabled";??
  8. ??}??
  9. ??else?if($status?==?PHP_SESSION_NONE?)??
  10. ??{??
  11. ????echo?"Session?Enabled?but?No?Session?values?Created";??
  12. ??}??
  13. ??else??
  14. ??{??
  15. ????echo?"Session?Enabled?and?Session?values?Created";??
  16. ??}??



? 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)?

Related labels：
echo php session
source：php.cn
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