Question

可能重复：
  Headers already sent by PHP
  Reference - What does this error mean in PHP?

<?php
include 'connect.php';
include 'header.php';
?>      
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<?php
include 'footer.php';
?>

上述代码有什么问题？它一直在给我

'警告：session_start（）[function.session-start]：无法发送会话缓存限制器 - 已发送的标头（输出始于 /home/u599980382/public_html/newsite/index.php:1)in /home/u599980382/public_html/newsite/connect.php在第2行'。

它不会在任何其他页面上执行此操作，甚至不会在具有几乎相同的确切代码的页面上执行此操作（仅内容不同）;它只在索引上执行此操作。提前感谢您提供的任何帮助。

Answer 1

尚未发送标头函数标头的使用你可以检查一下 headers_sent

// If no headers are sent, send one
if (!headers_sent()) {
......
}

您可以将代码更改为此案例：

<?php
include 'header.php';
include 'connect.php';
include 'content.php';
?>

错误：已发送标头

1 个答案: