为什么迭代超过10,000次的foreach循环会耗尽内存？

Question

我正在开发一个循环/迭代超过10,000次的PHP脚本:

foreach ($array_with_items as $item) {

    // Instantiate the object
    $obj_car = new CarAds($puk, 'ENG', '5');

    $obj_car->detail1 = "Info about detail1";
    $obj_car->detail2 = "Info about detail2";
    $obj_car->detail3 = "Info about detail3";
    $obj_car->detail4 = "Info about detail4";

    // Saves to the database
    $obk_car->save;
}

当我运行此代码时,我的机器内存不足.在这个foreach循环中,我该怎么做才能清理内存？

Answer 1

您将$ Car_s对象实例化为$ array_with_items项目计数.每一个都分配内存.

在save()方法之后,您应该使用unset()函数释放该对象:

// Saves to the database
$obj_car->save;

// Unset unneeded object
unset($obj_car);

您可以使用memory_get_usage()检查内存消耗(请参阅http://php.net/manual/en/function.memory-get-usage.php)

Answer 2

unset($obk_car)在循环结束时尝试.