PHP HTTP Headers

Modify HTTP Headers (Examples)
Many examples that show how to use the header() function of PHP

If you want to check your headers, you can use web based tools like:,
web-browser extensions (e.g. LiveHTTPHeaders, ieHTTPHeaders) or another third-party software tool.

// See related links for more status codes   // Use this header instruction to fix 404 headers
// produced by url rewriting...
header('HTTP/1.1 200 OK');   // Page was not found:
header('HTTP/1.1 404 Not Found');   // Access forbidden:
header('HTTP/1.1 403 Forbidden');   // The page moved permanently should be used for
// all redrictions, because search engines know
// what's going on and can easily update their urls.
header('HTTP/1.1 301 Moved Permanently');   // Server error
header('HTTP/1.1 500 Internal Server Error');   // Redirect to a new location:
header('Location:');   // Redriect with a delay:
header('Refresh: 10; url=');
print 'You will be redirected in 10 seconds';   // you can also use the HTML syntax:
// <meta http-equiv="refresh" content="10; />   // override X-Powered-By value
header('X-Powered-By: PHP/4.4.0');
header('X-Powered-By: Brain/0.6b');   // content language (en = English)
header('Content-language: en');   // last modified (good for caching)
$time = time() - 60; // or filemtime($fn), etc
header('Last-Modified: '.gmdate('D, d M Y H:i:s', $time).' GMT');   // header for telling the browser that the content
// did not get changed
header('HTTP/1.1 304 Not Modified');   // set content length (good for caching):
header('Content-Length: 1234');   // Headers for an download:
header('Content-Type: application/octet-stream');
header('Content-Disposition: attachment; filename=""'); 
header('Content-Transfer-Encoding: binary');
// load the file to send:
readfile('');   // Disable caching of the current document:
header('Cache-Control: no-cache, no-store, max-age=0, must-revalidate');
header('Expires: Mon, 26 Jul 1997 05:00:00 GMT'); // Date in the past
header('Pragma: no-cache');   // set content type:
header('Content-Type: text/html; charset=iso-8859-1');
header('Content-Type: text/html; charset=utf-8');
header('Content-Type: text/plain'); // plain text file
header('Content-Type: image/jpeg'); // JPG picture
header('Content-Type: application/zip'); // ZIP file
header('Content-Type: application/pdf'); // PDF file
header('Content-Type: audio/mpeg'); // Audio MPEG (MP3,...) file
header('Content-Type: application/x-shockwave-flash'); // Flash animation   // show sign in box
header('HTTP/1.1 401 Unauthorized');
header('WWW-Authenticate: Basic realm="Top Secret"');
print 'Text that will be displayed if the user hits cancel or ';
print 'enters wrong login data';

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