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$_SESSION['user_id']从<?phpinclude "connect.php";session_start();$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 $SESSION_['user_id']</body>我希望这个变量稍后插入到数据库中。有什么建议？
2 回答
慕虎7371278
TA贡献1802条经验 获得超4个赞
如果要在外部 js 文件中调用 php 变量，则必须将值存储在输入中。
主文件
<body>
<input type="hidden" value="$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
TA贡献1801条经验 获得超15个赞
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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