Alternative to http_response_code in lower versions than php5.4

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Alternative to http_response_code in lower versions than php5.4

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#1 by (3 votes)

4

You can get HTTP status in versions prior to PHP 5.4 ( http_status_code is only supported in PHP5.4 +)?

I'm creating a custom error page system, it's not going to be a system for a specific project, but as a matter of compatibility I'd like to know if it's possible to detect the state of PHP without using http_response_code .

I need to be independent of the server type because the script can run on Apache, Nginx and Lighttpd.

Is this possible? I tried $GLOBALS and $_SERVER['REDIRECT_STATUS'] , but in case of this, it only works in Apache, in php-fpm only gets status 200 .

php http-status

asked by anonymous 29.05.2015 / 00:27

1 answer

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score 3 · Accepted Answer

In order to work in prior to 5.4, such as php5.3 and php5.3, you can create "reserved" urls using ErrorDocument (apache, see alternatives to other servers below), using for example:

.htacces (apache)

ErrorDocument 403 /index.php/RESERVED.HTTP-STATUS-403.html
ErrorDocument 404 /index.php/RESERVED.HTTP-STATUS-404.html

nginx

error_page 404 /RESERVED.HTTP-STATUS-404.html;
error_page 403 /RESERVED.HTTP-STATUS-403.html;

location ~ ^/RESERVED\.HTTP\-STATUS\-(403|404)\.html$ {
    rewrite ^/RESERVED\.HTTP\-STATUS\-(403|404)\.html$ /index.php$0 last;
}

IIS

<httpErrors errorMode="Custom">
    <remove statusCode="403" />
    <remove statusCode="404" />
    <error statusCode="403" path="/index.php/RESERVED.HTTP-STATUS-403.html" responseMode="ExecuteURL" />
    <error statusCode="404" path="/index.php/RESERVED.HTTP-STATUS-501.html" responseMode="ExecuteURL" />
</httpErrors>

PHP

The file should contain this code:

/*Verifica se a função não esta disponível (versões anteriores ao php5.4)*/
if (false === function_exists('http_response_code')) {
    /*Fallback para versões mais antigas que o PHP5.4*/
    function http_response_code($code = null)
    {
        static $currentStatus;

        if ($code === null) {
            if ($currentStatus !== null) {
                return $currentStatus;
            }

            $currentStatus = 200;

            if (empty($_SERVER['PHP_SELF']) === false &&
                preg_match('#/RESERVED\.HTTP\-STATUS\-(\d{3})\.html$#', $_SERVER['PHP_SELF'], $match) > 0)
            {
                $currentStatus = (int) $match[1];
            }
        } elseif (is_int($code) && headers_sent() === false) {
            header('X-PHP-Response-Code: ' . $code, true, $code);
            $currentStatus = $code;
        }

        return $currentStatus;
    }
}

Note that the function will always fire for index.php, but you can change it to error.php or to your liking.