从循环对象中删除项目 [英] Removing an item from object in a loop

问题描述

我有一组Db结果存储在一个对象中.我需要遍历结果并检查属性(使用另一个数据库查询)，然后使用if语句从对象中删除该项目.这是我正在尝试的简化版本:

I have a set of Db results that are stored in an object. I need to loop through the results and check a property (using another DB query) and then use an if statement to remove the item from the object. Here is a simplified version of what I'm attempting:

foreach ($products as $product) {

    if(!$product->active) {
        unset($product);
    }

}
print_r($products);

但是，当我print_r时，项目仍在对象中.我很困惑.

However when I print_r the items are still in the object. I'm getting confused.

推荐答案

那是预期的行为.做你想要的事情有两种主要方法

Thats expected behaviour. There are two main way of doing what you want

foreach ($products as $key => $product) {

    if(!$product->active) {
        unset($products[$key]);
    }

}

第二种方法是使用参考

foreach ($products as &$product) {

    if(!$product->active) {
        unset($product);
    }

}

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