assegnare ad una variabile il contenuto di un file

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ho provato così:

<?
// copia il contenuto di un file in una stringa
$filename = "http://www.milaureo.com/index.php";
$handle = fopen($filename, "r");
$contents = fread($handle, filesize($filename));
fclose($handle);
print "$contents";
?>

ma mi da questi errori...

Warning: filesize(): Stat failed for http://www.milaureo.com/index.php (errno=2 - No such file or directory) in /web/htdocs/www.milaureo.com/home/prova.php on line 6

Warning: fread(): Length parameter must be greater than 0. in /web/htdocs/www.milaureo.com/home/prova.php on line 6