php测试硬盘写速率

使用php写入一个1GB大小的文件，检查硬盘的写速率，可能有一定误差，

建议还是使用专业的硬盘测试工具来检测

一般电脑读写在20M/s，这个测试要执行大概40-50s

1. [代码][PHP]代码 

<?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 ".$usetime." seconds\n";
echo "speed :".$write_xiaolv." byte/s\n";
echo "speed :".$myga_xiaolv." m/s\n";

2. [图片] QQ截图20140126093610.png