session值的開啟

session_start()
<?php
$username=$_POST['username'];//賬號$passWord=$_POST['password'];//密碼
session_start();//開啟session$_SESSION["username"]=$username;$_SESSION["password"]=$password;
?>
session值的銷毀
對于單個的session值銷毀
unset($_SESSION["username"]);unset($_SESSION["password"]);
銷毀全部的session值
session_unset()