كيف يمكن فحص اتصال الانترنت وسرعته برمجيا؟

السلام عليكم 

اخي لكي تتمكن من التاكد من الاتصال

<?php
function is_connected()
{
    $connected = @fsockopen("www.example.com", 80); 
                                        //website, port  (try 80 or 443)
    if ($connected){
        $is_conn = true; //action when connected
        fclose($connected);
    }else{
        $is_conn = false; //action in connection failure
    }
    return $is_conn;

}
?>

و لكي تتمكن من التعرف على سرعة الاتصال

function microtime_diff($a, $b) {
list($a_dec, $a_sec) = explode(" ", $a);
list($b_dec, $b_sec) = explode(" ", $b);
return $b_sec - $a_sec + $b_dec - $a_dec;
}

function test_speed($test_size) {
flush();
$start_time = microtime();
$comment = "<!--O-->";
$len = strlen($comment);
for($i = 0; $i < $test_size; $i += $len) {
echo $comment;
}
flush();
$duration = microtime_diff($start_time, microtime());
if($duration != 0) {
return $test_size / $duration / 1024;
}
else {
return log(0);
}
}

$speed = test_speed(1024);
if($speed > 50) { // a fast connection, send more byte for more accuracy
$speed = test_speed(10240);
if($speed > 500) { // a really fast connection, send even more byte for
more accuracy
$speed = test_speed(102400);
}
}
echo sprintf("Download speed is %0.3f kb/s", $speed);

اشكرك جدا