<?php

/*=====http://hi.csdn.net/yinyiniao=====*/

$fp=fopen("cs.txt","w");

for($i=0;$i<170400;$i++){

    fwrite($fp,"bandwidth");

}

fclose($fp);

/*=====http://hi.csdn.net/yinyiniao=====*/

?>  

<?php

/*=====http://hi.csdn.net/yinyiniao=====*/

function mymicrotime(){

    list($usec, $sec) = explode(" ",microtime());

    return ((float)$usec + (float)$sec);

}

$data=file_get_contents("cs.txt");

$start=mymicrotime();

$fsize=filesize("cs.txt")/1024;

//echo $fsize."kb<br>";

echo "<!--".$data."-->";  

$stop=mymicrotime();

$duration=($stop-$start);

//echo $duration."s<br>";

$speed=round($fsize/$duration,2);

echo "Your network speed:$speed KB/sec";  

?>