PHP 5.4.X能够在HTML标记后放置setcookie（）而不发出“标题已发送”警告吗？
[英]PHP 5.4.X is capable of placing setcookie() after HTML markups without “Headers already sent” warning?
问题描述
I used to experience Warning: Cannot add header information - headers already sent when trying to place header() session_start() or setcookie() after echo or any HTML markups. 
我曾经遇到过警告：无法添加标头信息-尝试在echo或任何HTML标记后放置header() session_start()或setcookie()时已经发送的 header() 。 But when I upgraded the PHP in my local server to 5.4.7 (in XAMPP 1.8.1 ), I don't encounter this warning anymore. 但是，当我将本地服务器中的PHP升级到5.4.7 （在XAMPP 1.8.1中 ）时，不再遇到此警告。 Is this normal for PHP 5.4.X? PHP 5.4.X正常吗？
I tried placing setcookie() after some texts and an echo in this example: 在此示例中，我尝试将setcookie()放在一些文本和echo之后：
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8" />
<title>Cookie Test</title>
</head>
<body>
<h1>Cookie Test</h1>
<?php
if (isset($_COOKIE['test'])) {
echo "<p>{$_COOKIE['test']}</p>";
} else {
echo "<p>No cookie..</p>";
setcookie('test', 'You have a cookie!', time()+300, '/');
}
?>
</body>
</html>
Then I open the page via localhost/that-page.php and refresh .. 然后我通过localhost / that-page.php打开页面并刷新..
Cookie Test
You have a cookie!
In my test environment, setcookie() works normally without any warning. 在我的测试环境中， setcookie()可以正常工作而不会发出任何警告。 Is something wrong with my settings? 我的设置有问题吗？ Thank you. 谢谢。
Win7x64 and XAMPP 1.8.1 used 使用Win7x64和XAMPP 1.8.1
1 个解决方案
解决方案1
2 已采纳 2013-07-10 19:18:39
The only environmental issue that can lead to to this behavior is for output buffering to be turned on. 可能导致此行为的唯一环境问题是打开输出缓冲。
This can be done in a number of ways 这可以通过多种方式完成
In the php.ini with 在php.ini中
output_buffering = On
or 要么
In htaccess/httpd.conf with 在htaccess / httpd.conf中
php_flag output_buffering On
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