PHP getallheaders Usage Precautions

This function is a alias for Apache_request_headers (). Please read the apache_request_headers () documentation For more information in how this function works.

So if you want to use the This function in any platform,you should detect if it is exists:

if (!function_exists (' getallheaders ')) {    function getallheaders ()    {        $headers = ';        foreach ($_server as $name = = $value)        {            if (substr ($name, 0, 5) = = ' Http_ ')            {                $headers [Str_replace ( ', '-', Ucwords (Strtolower (Str_replace (' _ ', ', ' substr ($name, 5)))])] = $value;            }        }        return $headers;    }}