php測試硬盤寫速率

 使用php寫入一個1GB大小的文件，檢查硬盤的寫速率，可能有一定誤差，

建議還是使用專業的硬盤測試工具來檢測

一般電腦讀寫在20M/s，這個測試要執行大概40-50s

<?php

set_time_limit(0);

$str = str_pad($str, 512, "0");

$file = fopen("./temp","a+");

$i = 0;

$bytes = 1000000000;

$mygabyte = $bytes/1000000;

echo "test start. waiting ...";

$starttime = time();

while($i < $bytes){

$i += fwrite($file, $str);

}

$endtime = time();

$usetime = $endtime - $starttime;

$write_xiaolv = $bytes/$usetime;

$myga_xiaolv = $mygabyte/$usetime;

echo "create 1GB file use time ".$usetime." secondsn";

echo "speed :".$write_xiaolv." byte/sn";

echo "speed :".$myga_xiaolv." m/sn";