doubao12345 2017-06-11 03:04
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如果指定了<html>标签，PHP重定向将失败[重复]

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<html>
<body>
<?php
    error_reporting(E_ALL | E_WARNING | E_NOTICE);
    ini_set('display_errors', TRUE);
    if( $_SERVER['REQUEST_METHOD'] == 'POST') {
        header('Location: https://www.google.com/', true, 302);
    exit();
    }
?>
<form method='post'>
<input type='submit' name='submit' value='Submit' /><br />
</form>
</body>
</html>

The form works as expected if the "html" and "body" tags are removed. The presence of either one of them causes failure. This occurs on one hosting site; however I can run it on another host without any problems.

Are there any settings in php.ini that could cause this behavior?

When the code runs with the "html" or "body" tags, this error is displayed: Warning: Cannot modify header information - headers already sent by (output started at /webroot/m/o/montc001/primary/www/test.php:3) in /webroot/m/o/montc001/primary/www/test.php on line 7

The site that fails, also has Wordpress installed. The WP site is being replaced by a new implementation.

</div>
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1条回答 默认 最新

  • dongyuan2652 2017-06-11 03:14
    关注

    Your header function has to be at the top and called before any html is printed out.

    From the php.net documentation (http://php.net/manual/en/function.header.php) :

    Remember that header() must be called before any actual output is sent, either by normal HTML tags, blank lines in a file, or from PHP. It is a very common error to read code with include, or require, functions, or another file access function, and have spaces or empty lines that are output before header() is called. The same problem exists when using a single PHP/HTML file.

    So your code should be something like:

    <?php
    error_reporting(E_ALL | E_WARNING | E_NOTICE);
    ini_set('display_errors', TRUE);
    if( $_SERVER['REQUEST_METHOD'] == 'POST') {
        header('Location: https://www.google.com/', true, 302);
    exit();
    }
?>
<html>
<body>
<form method='post'>
<input type='submit' name='submit' value='Submit' /><br />
</form>
</body>
</html>
    本回答被题主选为最佳回答 , 对您是否有帮助呢?
    评论

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