代碼如下

$num = M('log')->where("date_format(create_time,'%Y-%m') = '$date'")->count('id');

    for($i = 0; ($i+5000)<=20000;$i += 5000){

        $datas = M('credit_log')->where("date_format(create_time,'%Y-%m') = '$date'")->limit($i,$i+5000)->select();
        echo $this->convert(memory_get_usage(true)).'<br/>';
        unset($datas);
        //sleep(5);
    }
    
    

循環(huán)幾次之后，內存溢出，為什么會內存溢出？因為unset函數(shù)沒有釋放內存？