如何在外部 javascript 中从 php 访问会话变量
我知道以前有人问过这个问题，但从头到尾都没有解释。我有一个login.php我想从中获得$_SESSION['user_id']
从
<?php
include "connect.php";
session_start();
$email=$_POST['email'];
$password=$_POST['password'];
$select_data=mysql_query("select * from user where email='$email' and password='$password'");
if(isset($_POST['email']))
{
if($row=mysql_fetch_array($select_data))
{
$_SESSION['user_id']=$row['id']; //The variable want to access from ext.js
echo "success";
}
else
{
echo "fail";
}
exit();
}
?>
顺便说一句，这种身份验证工作正常
我的主.php
<!DOCTYPE html>
<?php include 'connect.php';
session_start();
echo $_SESSION['user_id']; //works fine
//;
?>
<body>
//contents
<script src="login.js"></script>
<script src="postad.js"></script> //the script from which I want to get $SESSION_['user_id']
</body>
我希望这个变量稍后插入到数据库中。有什么建议？
HUWWW2回答
-
慕虎7371278
如果要在外部 js 文件中调用 php 变量，则必须将值存储在输入中。主文件<body><input type="hidden" value="$SESSION_['user_id']" class="user_id"><script src="login.js"></script><script src="postad.js"></script> //the script from which I want to get $SESSION_['user_id']</body>postad.js$(function(){ var user_id = $('.user_id').val(); alert(user_id);});如果你想在同一个文件中使用，那么你可以直接使用 php echo。主文件<body> //content..<script> var user_id = "<?php echo $SESSION_['user_id'] ?>";</script><script src="login.js"></script><script src="postad.js"></script> // console.log(user_id); that file you'll get that id.</body> -
侃侃尔雅
您可以将会话 ID 值分配给 JavaScript 变量以使其可用于 JavaScript：<!DOCTYPE html><?php include 'connect.php';session_start();echo $_SESSION['user_id']; //works fine//;?><body>//contents<script> var sessionId = "<?php echo $_SESSION['user_id'] ?>";</script><script src="login.js"></script><script src="postad.js"></script> // "sessionId" variable should be available for the script</body>
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