What is header in PHP

The header in php is mainly used to send the original http header to the client. It is commonly used to notify the browser that the page does not exist, delay redirection, indicate content type, declare downloaded files, and update the current document. Disable caching, display a login dialog requiring verification, etc.

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The header() function in PHP is used to send the original HTTP header to the client. Today I will share with you some commonly used header function headers in PHP. It has certain reference value and I hope it will be helpful to everyone.

header('HTTP/1.1 200 OK'); // ok normal access

header('HTTP/1.1 404 Not Found'); //notify the browser that the page does not exist

header('HTTP/1.1 301 Moved Permanently'); //Set the address to be permanently redirected 301

header('Location: http://www.ithhc.cn/'); //Jump to a new address

header('Refresh: 10; url=http://www.ithhc.cn/'); //Delayed redirection means jumping every few seconds

header('X-Powered-By: PHP/6.0.0'); //Modify X-Powered-By information

header('Content-language: en'); //Documentation Language

header('Content-Length: 1234'); //Set the content length

header('Last-Modified: '.gmdate('D, d M Y H:i:s' , $time).' GMT'); //Tell the browser the last modification time

header('HTTP/1.1 304 Not Modified'); //Tell the browser that the document content has not changed

Indicates the content type

header('Content-Type: text/html; charset=utf-8'); //Web page encoding

header(' Content-Type: text/plain'); //Plain text format

header('Content-Type: image/jpeg'); //JPG, JPEG

header('Content- Type: application/zip'); // ZIP file

header('Content-Type: application/pdf'); // PDF file

header('Content-Type: audio/ mpeg'); //Audio file

header('Content-type: text/css'); //css file

header('Content-type: text/javascript'); //js file

header('Content-type: application/json'); //json

header('Content-type: application/pdf'); //pdf

header('Content-type: text/xml'); //xml

header('Content-Type: application/x-shockw**e-flash'); //Flash animation

Declare a downloaded file

header('Content-Type: application/octet-stream');

header(' Content-Disposition: attachment; filename="ITblog.zip"');

header('Content-Transfer-Encoding: binary');

readfile('test.zip');

Disable caching for 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');

Display a login dialog box that requires verification

header('HTTP/1.1 401 Unauthorized');

header('WWW-Authenticate: Basic realm="Top Secret"');

Declare an xls that needs to be downloaded File

header('Content-Disposition: attachment; filename=ithhc.xlsx');

header('Content-Type: application/vnd.openxmlformats-officedocument.spreadsheetml. sheet');

header('Content-Length: '.filesize('./test.xls'));

header('Content-Transfer-Encoding: binary');

header('Cache-Control: must-revalidate');

header('Pragma: public');

readfile('./test.xls') ;

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