sure, that line 1092 causing errors

$headers[str_replace(' ', '-', ucwords(strtolower(str_replace('_', ' ', substr($name, 5)))))] = $value;

that block about nginx

// **********************************************************************// 
// ! It could be useful if you using nginx instead of apache 
// **********************************************************************// 

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; 
    } 
}