Header Common Instructions_PHP Tutorial

Header common commands
The header is divided into three parts:
The first part is the version of the HTTP protocol (HTTP-Version);
The second part is the status code (Status);
The third part is Reason-Phrase.

// fix 404 pages: Use this header command to solve the 404 header caused by URL rewriting
header('HTTP/1.1 200 OK');

// set 404 header: Page not found
header('HTTP/1.1 404 Not Found');

//Pages are permanently deleted and search engines can be told to update their urls
// set Moved Permanently header (good for redrictions)
// use with location header
header('HTTP/1.1 301 Moved Permanently');

// Restricted access
header('HTTP/1.1 403 Forbidden');

// Server error
header('HTTP/1.1 500 Internal Server Error');

// Redirect to a new location
// redirect to a new location:
header('Location: http://www.example.org/');

Redirect after a delay
// redrict with delay:
header('Refresh: 10; url=http://www.example.org/');
print 'You will be redirected in 10 seconds';

// Override X-Powered-By value
// override X-Powered-By: PHP:
header('X-Powered-By: PHP/4.4.0');
header('X-Powered-By: Brain/0.6b');

// Content language (en = English)
// content language (en = English)
header('Content-language: en');

//Last modification time (can be used when caching)
// 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');

// Tell the browser that the content to be retrieved has not been updated
// header for telling the browser that the content
// did not get changed
header('HTTP/1.1 304 Not Modified');

//Set the length of the content (can be used when caching):
// set content length (good for caching):
header('Content-Length: 1234');

// Used to download files:
// Headers for an download:
header('Content-Type: application/octet-stream');
header('Content-Disposition: attachment; filename="example.zip"');
header('Content-Transfer-Encoding: binary');

// Disable caching of the current document:
// load the file to send:readfile('example.zip');
// 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');

//Set content type:
// Date in the pastheader('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');

// Display the login dialog box, which can be used for HTTP authentication
// 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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