php session 检测和注销

2024-02-06 221 0

- N +


<?php 
session_start(); 
$_SESSION['username']="zhuzhao"; 
?>


<?php 
session_start(); 
unset($_SESSION['username']); 
if(isset($_SESSION['username'])) 
echo "username已经存在"; 
else 
echo "username不存在"; 
?>

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