Fra*_*sca -5 php session session-variables
我试图在PHP中启动一个会话，以便存储有关用户ID的数据（将在mySQL DB中使用）。
但是，当我开始会话时，出现以下错误：
Warning: session_start(): Cannot send session cookie - headers already sent by (output started at /Applications/MAMP/blah) in /Applications/MAMP/blah on line 38
Warning: session_start(): Cannot send session cache limiter - headers already sent (output started at /Applications/MAMP/blah) in /Applications/MAMP/blah on line 38
我了解错误是因为页面已提交或“标题已发送”而无法启动会话，但是我非常困惑，因为它所引用的行38行是启动会话的行：
Line 38: session_start();
因此，如何说标头已经通过此行发送，这就是错误？
这是我的代码的简化部分。注意，HTML的一部分是通过jQuery使用AJAX加载的，是否可以？
<!DOCTYPE html>
<html>
<head>
<title>Title</title>
</head>
<body>
<div class="wrapper">
<div id="quiz-section">
// This part is where the HTML content loads via AJAX
</div>
</div>
<!-- Below PHP looks at the referral i.e how the user landed on this page -->
<?php
session_start();
require 'connect.php';
if (!mysqli_query($con,"INSERT INTO entries (referral) VALUES ('$ref')")){
echo("Error description: " . mysqli_error($con));
return false;
}
$_SESSION["sessionID"] = mysqli_insert_id($con);
mysqli_close($con);
?>
</body>
<script>
// some jQuery here to load in the HTML content to the AJAX pane
</script>
</html>