Php header () functions

Source: Internet
Author: User
Tags response code

Header (string, replace, http_response_code)
String is required. Specifies the header string to be sent.
Replace is optional. Indicates whether the header replaces the previous header or adds the second header.

The default value is true (replace ). False (multiple headers of the same type are allowed ).
Http_response_code is optional. Forces the http response code to the specified value. (Php 4 and later versions are available)


Header ('Location: /');

Send http status

Header ("status: 404 not found ");

Set cache

Header ("cache-control: no-cache, must-revalidate"); // http/1.1
Header ("expires: sat, 26 jul 1997 05:00:00 gmt ");

Use the header for file download


Header ("content-type: application/pdf ");

// The file will be called downloaded.pdf

Header ("content-disposition: attachment?filename='downloaded= '");

// The pdf source is in original.pdf
Readfile ("original.pdf ");


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