PHP 读取文件 放到数组中

$file = "http://cho.com/js/1.txt";
$content = file_get_contents($file);
//echo $content;

$list = explode("
", $content);
//print_r($array);
echo count($list);
echo "<br />";

//去空值
$a = array_filter($list);
//去重复
$a = array_unique ($a);

echo "<br />";
echo count($a);