$fp=fopen("cs.txt","w");
for($i=0;$i<170400;$i++){
fwrite($fp,"test");
}
fclose($fp);
//计算网速
function getmicrotime()
{
list($usec,$sec) = explode("",microtime());
return ((float)($usec) + (float)($sec));
}
$data = file_get_contents("cs.txt");
$start = getmicrotime();
$filesize = filesize("cs.txt") / 1024;
echo "";
$stop = getmicrotime();
$duration = ($stop - $start);
$speed = round($filesize/$duration,2);
echo "你的网速：$speed kB/秒";
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