php header () function detailed and practical method

php tutorial header () function detailed practical methods

header (string, replace, http_response_code)
string Required. Specifies the header string to send.
replace optional. Indicates whether the header replaces the previous header or adds the second header.

The default is true (replace). false (allows multiple headers of the same type).

http_response_code Optional. Forcing the http response code to the specified value. (Php 4 and higher are available)

Jump

header ('location: http://www.jzread.com/'); send http status

header ("status: 404 not found");

Set the cache

header ("cache-control: no-cache, must-revalidate"); // http / 1.1
header ("expires: sat, 26 jul 1997 05:00:00 gmt");
Make use of header file download function

* /

header ("content-type: application / pdf"); // The file will be called downloaded.pdf

header ("content-disposition: attachment; filename = 'downloaded.pdf'"); // pdf source in original.pdf
readfile ("original.pdf");

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