PHP header( “Location: /404.php”, true, 404 ) does

2019-02-12 03:00发布

站内问答 / PHP
1488 5 4

I'd like to use the following to redirect pages that are no longer present in the database to the custom 404 page:

ob_start();
....
if ( !$found ):
  header( "Location: /404.php", true, 404 );
  exit();
endif;

But this actually does not redirect, but just shows an empty page (because of the exit() call before any output to the browser).

I've also tried the following:

if ( !$found ):
  header( "HTTP/1.1 404 Not Found" );
  exit();
endif;

With a 'ErrorDocument 404 /404.php' in my .htaccess file, but this also just shows an empty page.

And if I do this:

if ( !$found ):
  header( "HTTP/1.1 404 Not Found" );
  header( "Location: /404.php" );
  exit();
endif;

It does redirect, but with a 302 header.

Any help would be greatly appreciated.

5条回答
够拽才男人
2楼-- · 2019-02-12 03:23

I think your problem is because of the output buffering you're starting, or because you can't redirect with a 404. The first code example shows the output buffer starting but exiting instead of cleaning the output buffer and stopping output buffering.

Change the first example to:

if (!$found) {
  ob_end_clean();
  header('Location: /404.php');
  exit();
}
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孤傲高冷的网名
3楼-- · 2019-02-12 03:35

I know it's a old issue but I just found it handy:

php set status header to 404 and add a refresh to correct page, like a 2 seconds after.

header('HTTP/1.1 404 Not Found');
header("Refresh:0; url=search.php");

Then you have the 404 page showing up a few second before redirecting to fx search page.

In my case, Symfony2, with a exception listener:

$request  = $event->getRequest();
$hostname = $request->getSchemeAndHttpHost();
$response->setStatusCode(404);
$response->setContent('<html>404, page not found</html>');
$response->headers->set('Refresh', '2;url='.$hostname.'/#!/404');

time ( 2) can be 0.2 if you wish very short time.

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一纸荒年 Trace。
4楼-- · 2019-02-12 03:40

Maybe without redirect?

if ( !$found ):
   include('../404.php');
   exit();
endif;
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小情绪 Triste *
5楼-- · 2019-02-12 03:40

I've tried and make sure to check error_log file that is correct way is send 404 headers and then include error page to next line.

<?php
header('HTTP/1.1 404 Not Found');
include 'search.php'; // or 404.php whatever you want...
exit();
?>

Finally you have to use exit() for text based browsers.

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萌系小妹纸
6楼-- · 2019-02-12 03:43

You can't have an header 404 with a Location:

You should display the error page and set a meta refresh with the new url if you want to redirect

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