如何在php中简化数组

Question

我有以下数组，我想简化数组以添加我的逻辑来检查产品数量

数组如下：-

$conditions = Array
    (
        [type] => Magento\SalesRule\Model\Rule\Condition\Combine
        [attribute] => 
        [operator] => 
        [value] => 1
        [is_value_processed] => 
        [aggregator] => all
        [conditions] => Array
            (
                [0] => Array
                    (
                        [type] => Magento\SalesRule\Model\Rule\Condition\Product\Found
                        [attribute] => 
                        [operator] => 
                        [value] => 1
                        [is_value_processed] => 
                        [aggregator] => all
                        [conditions] => Array
                            (
                                [0] => Array
                                    (
                                        [type] => Magento\SalesRule\Model\Rule\Condition\Product
                                        [attribute] => category_ids
                                        [operator] => ==
                                        [value] => 5
                                        [is_value_processed] => 
                                    )

                                [1] => Array
                                    (
                                        [type] => Magento\SalesRule\Model\Rule\Condition\Product
                                        [attribute] => category_factor
                                        [operator] => ==
                                        [value] => 13
                                        [is_value_processed] => 
                                    )                                                         

                            )

                    )

                [1] => Array
                    (
                        [type] => Magently\CustomerRule\Model\Rule\Condition\Customer
                        [attribute] => product_qty
                        [operator] => >=
                        [value] => 99
                        [is_value_processed] => 
                    )

            )

    )

我想检查attribute operator 和value 如下：

if(product_qty >= 99){
//do your stuff
}

请帮我简化这个数组以添加我的条件来检查产品数量。

Answer 1

如果我对您的问题的理解正确。

你可以像这样使用数组索引：

foreach($conditions['conditions'] as $condition){

    if($condition['attribute'] == 'product_qty' && $condition['value']  >= 99 ){
        //do your stuff
    }

}

此代码检查attribute 是否等于product_qty 和value 是否大于等于 99。条件为真。

Answer 2

我认为你最好创建一个以数组作为输入的函数。 它会为每个提到的 ttrasn 做一个：

foreach($conditions['conditions'] as $condition){

    if($condition['attribute'] == 'product_qty' && $condition['value']  >= 99 ){
        //do your stuff
    }

}

但如果 $condition 是一个数组，则递归调用与该数组相同的函数。

Answer 3

您没有简单的方法来与存储在值中的运算符进行比较，因此您需要自己编写函数。一个简单的switch 就可以完成这项工作：

function compareValue($variable, $operator, $value){
    switch($operator)
    {
        case '==' : return $variable == $value ; break ;
        case '>=' : return $variable >= $value ; break ;
        /* add all possibilities here */
        default : throw new RuntimeException("Undefined operator '$operator'");
    }
}

要评估您的整个条件，您可以使用递归：

• 如果是一个值的比较，使用上面写的函数
• 如果是聚合，则评估所有子节点并定义聚合规则：

这是一个骨架：

function checkConditions($product, $condition){
    if($condition['attribute'] !== false and $condition['operator'] !== false)
    {
        // simple condition 
        $variableToCheck = $product[ $condition['attribute'] ] ; // maybe use your API to query this value
        $operator = $condition['operator'] ;
        $valueToCompare = $condition['value'] ;
        return compareValue($variableToCheck, $operator, $valueToCompare);
    }
    else
    {
        // composite condition 
        if( $condition['aggregator'] == 'all' )
        {
            // check for each child condition
            foreach($condition['conditions'] as $childCondition)
            {
                $childConditionReturn = checkConditions($product, $childCondition);
                if($childConditionReturn === false)
                {
                    // we found a child condition that is not satisfied, the whole 'all' aggregator is false
                    return false ;
                }
            }

            // all childs were evaluated to true, whole 'all' aggregator is true
            return true ;
        }
        else // handle other aggregator types here
        {

        }
    }
}