PHP - 嵌套 foreach 循环中的未设置对象

Question

长话短说 - 尝试在第一个 foreach 中取消设置 $this->models[$modelKey] 时取消设置效果很好，$this->models[$modelKey]->equipmentList->equipment[$eqKey] 指向正确的对象，但在嵌套的 foreach 中取消设置它不起作用。有任何想法吗？提前感谢您的帮助。

public function processModelsEquipmentList() {
    foreach ($this->models as $modelKey => $model) {
      if (!strstr('#', $model->id)) {
        foreach ($model->equipmentList->equipment as $eqKey => $equipment) {
          if (in_array($equipment->code, $this->specialVersionsCodes)) {
            $newModel = clone $model;   
            $newModel->name.= ' ' . $equipment->name;
            $newModel->id.= '#' . $equipment->id;
            if (strlen($newModel->code) < 4) {
              $newModel->code.=$equipment->code;
            }
            $newModel->order = $newModel->order + 1;
            $newEquipmentList = new EquipmentList($newModel->id, true);
            $newEquipmentList->add(clone $equipment);
            $newModel->setNewEquipmentList($newEquipmentList);
            $this->addModel($newModel);
            //echo $this->models[$modelKey]->equipmentList->equipment[$eqKey]->name;die();
            unset($this->models[$modelKey]->equipmentList->equipment[$eqKey]);
          }
        }
      }
    }
  }

Answer 1

它不是通过 $model 而不是 $this->models 访问的吗？和 $equipment 一样。

试试这个：

unset($equipment[$eqKey]); 

一些扩展：

foreach ($this->models as $modelKey => $model) {
    //here you use $model to access $this->models[X]
    foreach ($model->equipmentList->equipment as $eqKey => $equipment) { 
        //here you use $equipment to access $this->models[X]->equipmentList->equipment[x]
    } 
} 

编辑：

现在我得到了解决方案：

foreach ($this->models as $modelKey => $model) {
    foreach ($model->equipmentList->equipment as $eqKey => $equipment) {
        //use the $modelKey key and not the $eqKey
        unset($model->equipmentList->equipment[$modelKey]);
    } 
} 

Answer 2

如果我发现了，我会把这个作为答案，但如果我错了，我会把它移到评论中：

首先，您在最后克隆您尝试取消设置的对象。为什么不在克隆后立即取消设置？

其次，我认为该对象是通过设计通过引用传递给foreach循环的，因此您不需要引用键。

如果我是对的，这可能有效：

public function processModelsEquipmentList() {
    foreach ($this->models as $modelKey => $model) {
      if (!strstr('#', $model->id)) {
        foreach ($model->equipmentList->equipment as $eqKey => $equipment) {
          if (in_array($equipment->code, $this->specialVersionsCodes)) {
            $newModel = clone $model;
            unset($model);  // <-- Unesetting after clone, using loop var name.
            $newModel->name.= ' ' . $equipment->name;
            $newModel->id.= '#' . $equipment->id;
            if (strlen($newModel->code) < 4) {
              $newModel->code.=$equipment->code;
            }
            $newModel->order = $newModel->order + 1;
            $newEquipmentList = new EquipmentList($newModel->id, true);
            $newEquipmentList->add(clone $equipment);
            $newModel->setNewEquipmentList($newEquipmentList);
            $this->addModel($newModel);
          }
        }
      }
    }
  }