Notice: Undefined variable: _SESSION,该如何解决
Notice: Undefined variable: _SESSION
- PHP code
<!-- Code highlighting produced by Actipro CodeHighlighter (freeware) http://www.CodeHighlighter.com/ -->echo $_SESSION['time']."<br>";
这句话报错。
Notice: Undefined variable: _SESSION
但是加上赋值就不报错。并且可以显示出aa。
- PHP code
<!-- Code highlighting produced by Actipro CodeHighlighter (freeware) http://www.CodeHighlighter.com/ -->$_SESSION['time'] = 'aa'; echo $_SESSION['time']."<br>";
不知什么原因。
------解决方案--------------------
$_SESSION是在调用session_start()后才被定义的。在这之前，它不是超级全局变量。
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