php从数组删除元素

Question

我使用cakephp 2.0并且我提交的数据我要清理,数组结构如下我如何删除其中quantity = null的元素(quoteitem)？

我有这个,但它不起作用;

foreach($this->request->data['Quoteitem'] as $qi) {
 if($qi['quantity']==null){
 echo 'quantity is null,delete this quote item from array';                 
 unset($qi);
}       
}

被称为数组的结构($ this-> request-> data)

Array
(
    [Quote] => Array
        (
            [customer_id] => 72
            [user_id] => 104                
        )

    [Range] => Array
        (
            [id] => 
        )

    [Quoteitem] => Array
        (
            [0] => Array
                (
                    [product_id] => 
                    [unitcost] => 
                    [quantity] => 1
                )

            [1] => Array
                (
                    [product_id] => 
                    [unitcost] => 
                    [quantity] => 22
                )

            [2] => Array
                (
                    [product_id] => 339
                    [unitcost] => 5
                    [quantity] => 
                )     

        )

)

Answer 1

您可以使用数组键删除它:

foreach($this->request->data['Quoteitem'] as $key => $qi) {
   if($qi['quantity'] == null){
      echo 'quantity is null,delete this quote item from array';                 
      unset($this->request->data['Quoteitem'][$key]);
   }       
}

请注意,这将在数组中创建间隙(不存在的索引),通常这不会是一个问题,但如果是,您可以使用重新索引数组array_values().