How Can I Customize HTTP Response Codes in PHP?

Customizing HTTP Response Codes in PHP

To tailor HTTP response codes in PHP, employ one of the following approaches:

Manual Construction (PHP 4.0 )

Utilize header() with a custom HTTP response line:

header("HTTP/1.1 200 OK");

However, handle FastCGI PHP differently:

$sapi_type = php_sapi_name();
if (substr($sapi_type, 0, 3) == 'cgi')
    header("Status: 404 Not Found");
else
    header("HTTP/1.1 404 Not Found");

Third Argument to Header Function (PHP 4.3 )

Configure response codes comfortably using the third argument:

header(':', true, 404);
header('X-PHP-Response-Code: 404', true, 404);

http_response_code Function (PHP 5.4 )

Simplify response code configuration with http_response_code():

http_response_code(404);

Compatibility Function (PHP 4.3 )

For compatibility below PHP 5.4:

if (!function_exists('http_response_code'))
{
    function http_response_code($newcode = NULL)
    {
        static $code = 200;
        if($newcode !== NULL)
        {
            header('X-PHP-Response-Code: '.$newcode, true, $newcode);
            if(!headers_sent())
                $code = $newcode;
        }       
        return $code;
    }
}

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