BetterPHP

I'm having problems getting the api_interfece.php code to work

<?php

class foodclass{

	const API_URL = 'http://localhost/food/api.php';
	
        // internal function for sending post data
        private static function send_post_data($data)
        {
                $url = parse_url(self::API_URL);
                $boundary = md5(microtime(true));
               
                $post = '';
               
                foreach($data as $name => $value)
                {
                        $post .= "--{$boundary}\r\n";
                        $post .= "Content-Disposition: form-data; name=\"{$name}\"\r\n\r\n";
                        $post .= "{$value}\r\n";
                }
               
                $post .= "--{$boundary}--\r\n";
               
                if(isset($url['query']))
                {
                        $head = "POST {$url['path']}?{$url['query']} HTTP/1.1\r\n";
                }
                else
                {
                        $head = "POST {$url['path']} HTTP/1.1\r\n";
                }
               
                $head .= "Host: {$url['host']}\r\n";
                $head .= "Content-Type: multipart/form-data; boundary=\"{$boundary}\"\r\n";
                $head .= "Content-Length: " . strlen($post) . "\r\n";
                $head .= "Connection: close \r\n\r\n";
                               
                $socket = fsockopen($url['host'], ((isset($url['port'])) ? $url['port'] : 80));
               
                fwrite($socket, "{$head}{$post}");
               
                return (end(explode("\r\n\r\n", stream_get_contents($socket))));
        }
	   
	   
		// Gets the user_id for the reference id given
		public static function lookup($ref)
		{
				return json_decode(self::send_post_data(array('x' => $ref)), true);
		}
}

foodclass::lookup('x');
?>

For some reason, I get this error:

Strict Standards: Only variables should be passed by reference in C:\xampp\htdocs\food\api_interface.php on line 42

Does anyone know what is wrong? I can get data with the api.php file without any problems...

Thanks in advance, oh and great tutorial btw

Edit:
I've just done some further testing.

If I change the code at the end to:

print_r (explode("\r\n\r\n", stream_get_contents($socket)));

I get the correct output, so something is telling me that the end() function is causing this problem!
I'll post back if I manage to solve the problem.

Edit 2:
Problem solved!

It was the end() function causing the problem!

Fix was:

$parts =  explode("\r\n\r\n", stream_get_contents($socket));
				return $parts[1];

The problem is that PHP does not want you to use function arguments as parameters to other functions.

So instead of

return (end(explode("\r\n\r\n", stream_get_contents($socket))));

it wants

$data = stream_get_contents($socket);
$data = explode("\r\n\r\n", $data);
return end($data);

which looks worse.

You can also disable these messages by setting your error_reporting setting to E_ALL

error_reporting(E_ALL);