PHP 代码如下

<?php

echo  'PHP 版本：'.PHP_VERSION."<br>";
$mod = php_sapi_name();
echo  'PHP 运行模式：'.$mod."<br>";
//apache2handler
//PHP 有多种运行模式，例如：apache、 apache2filter、apache2handler、 caudium、cgi 
//cgi-fcgi、cli、 cli-server、 continuity、embed、fpm-fcgi 等等。
 
#---------------------------------------------I/O 测试----------------------------------------------
// 记录开始时间
$starttime = getMicrotime();

// 读取 100000 次文件
for($i=0; $i<100000; $i++){
    file_get_contents('test.txt');//在同目录下建立个 text.txt 文件，写入一些内容
}

// 记录结束时间
$endtime = getMicrotime();

printf("I/O 时间:%f ms", ((float)($endtime)-(float)($starttime))*1000);

echo '<br>';
function getMicrotime(){
    list($usec, $sec) = explode(' ', microtime());
    return (float)$usec + (float)$sec;
}


class PerformanceTest
{
    private $time;
    private $memory;
    public function begin()
    {
        $this->time = $this->getTime();
        $this->memory = $this->getMemory();
    }
    public function end()
    {
        $this->time   = $this->getTime()   - $this->time;
        $this->time   = round($this->time,7);//在这里才能格式化时间
        $this->memory = $this->getMemory() - $this->memory;
        $this->memory = $this->convert($this->memory);
        echo "计算时间:{$this->time}秒<br />";
        echo "内存使用:{$this->memory}<br />";
    }
      
    public function getTime()
    { 
        list($usec, $sec) = explode(" ", microtime());
        return ((float)$usec + (float)$sec);
    }
    public function getMemory()
    {
        return memory_get_usage();
    }
    public function convert($size)
    {
        $unit=array('b','kb','mb','gb','tb','pb');
        return @round($size/pow(1024,($i=floor(log($size,1024)))),2).' '.$unit[$i];
    }
}

$a = array();
$b = new PerformanceTest();
$b->begin();
for($i=0;$i<500000;$i++){
$a[$i] = $i;
}
foreach($a as $i)
{
array_key_exists($i, $a);
}
$b->end();
 
?>

Vetrue.com 所用的云服务器 运行结果如下：