php's header function
This file type is declared functions such as
header ("content-type: text / html; charset=UTF-8");
is a declared file type is text / html format
and UTF8 encoded as a declaration
With this declaration can tell the browser what should be made here actions such as output picture
you can use image / gif of this type to compare the output
common usage also includes the conversion site such as
header ("Location: http://www.php.net");
This way convert the commonly used 301 or SEO Redirect
header ('HTTP / 1.1 301 Moved Permanently'); header ('Location: http://www.9qc.com/');
These are commonly used to provide reference usage
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