<div class="codetitle"><a style="CURSOR: pointer" data="81942" class="copybut" id="copybut81942" onclick="doCopy('code81942')"> 代码如下:<div class="codebody" id="code81942"> <?php session_start(); $_SESSION['username']="zhuzhao"; ?>
<div class="codetitle"><a style="CURSOR: pointer" data="73656" class="copybut" id="copybut73656" onclick="doCopy('code73656')"> 代码如下:<div class="codebody" id="code73656"> <?php session_start(); unset($_SESSION['username']); if(isset($_SESSION['username'])) echo "username已经存在"; else echo "username不存在"; ?>
(编辑:李大同)
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