我有这样一个需求,下面我以json格式展示便于查看结构。我需要删除多维数组中的空字段/指定字段,并且修改某些字段的键名称。

[
    {
        "_id":1,
        "name":"笔记本整机",
        "tag":"",
        "list":[
            {
                "_id":19,
                "name":"笔记本",
                "tag":"",
                "list":[
                    {
                        "_id":75,
                        "name":"笔记本电脑",
                        "tag":"notebook",
                        "list":[

                        ]
                    },
                    {
                        "_id":86,
                        "name":"电脑锁",
                        "tag":"notebook_lock",
                        "list":[

                        ]
                    }
                ]
            },
            {
                "_id":20,
                "name":"平板产品",
                "tag":"",
                "list":[
                    {
                        "_id":87,
                        "name":"平板电脑",
                        "tag":"tablepc",
                        "list":[

                        ]
                    },   
                    {
                        "_id":94,
                        "name":"其它配件",
                        "tag":"other_accessories",
                        "list":[

                        ]
                    }
                ]
            }
        ]
    },
    {
        "_id":2,
        "name":"手机",
        "tag":"",
        "list":[
            {
                "_id":22,
                "name":"手机",
                "tag":"",
                "list":[
                    {
                        "_id":105,
                        "name":"手机",
                        "tag":"cell_phone",
                        "list":[

                        ]
                    },      
                    {
                        "_id":115,
                        "name":"号卡专区",
                        "tag":"haoka",
                        "list":[

                        ]
                    }
                ]
            },
            {
                "_id":23,
                "name":"通讯产品",
                "tag":"",
                "list":[
                    {
                        "_id":116,
                        "name":"集团电话",
                        "tag":"groupphone",
                        "list":[

                        ]
                    },
                    {
                        "_id":124,
                        "name":"呼叫器",
                        "tag":"beeper",
                        "list":[

                        ]
                    }
                ]
            }
        ]
    }
]

需求:

• 删除多维数组中tag、list键值为空的
• 修改_id键为id键、修改list键为child键

正确格式如下json

[
    {
        "id":1,
        "name":"笔记本整机",        
        "child":[
            {
                "id":19,
                "name":"笔记本",                
                "child":[
                    {
                        "id":75,
                        "name":"笔记本电脑"                     
                    },
                    {
                        "id":86,
                        "name":"电脑锁"                    
                    }
                ]
            },
            {
                "id":20,
                "name":"平板产品",                
                "child":[
                    {
                        "id":87,
                        "name":"平板电脑"                   
                    },   
                    {
                        "id":94,
                        "name":"其它配件"                  
                    }
                ]
            }
        ]
    },
    {
        "id":2,
        "name":"手机",
        "child":[
            {
                "id":22,
                "name":"手机",  
                "child":[
                    {
                        "id":105,
                        "name":"手机" 
                    },      
                    {
                        "id":115,
                        "name":"号卡专区"
                    }
                ]
            },
            {
                "id":23,
                "name":"通讯产品",
                "child":[
                    {
                        "id":116,
                        "name":"集团电话"
                    },
                    {
                        "id":124,
                        "name":"呼叫器"
                    }
                ]
            }
        ]
    }
]

php代码如下

<?php
     /**
     * @param array $arr 原数组
     *
     * 修改前的_id键对应修改后的id,修改前的list键对应修改后的child
     *
     * @param array $editKey =>['_id' => 'id', 'list' => 'child']
     *
     * tag 键为true时,全部删除，list 键为false时,仅仅删除为空的数组或者字段
     * @param array $delKey  =>['tag' => true, 'list' => false]
     *
     * @return array
     */
    function array_filter_recursive(array &$arr, array $editKey, array $delKey)
    {
        if (count($arr) < 1) {
            return [];
        }
        foreach ($arr as $k => $v) {
            if (is_array($v)) {
                $arr[$k] = $this->array_filter_recursive($v, $editKey, $delKey);
            }
            $key = '';
            if (in_array($k, array_keys($editKey), true)) {//要修改的key
                $arr[$editKey[$k]] = $arr[$k];
                $key = $editKey[$k];
                unset($arr[$k]);
            }
            //要删除的key
            if (in_array($k, array_keys($delKey), true)) {
                if (!$delKey[$k] && (is_null($arr[$key]) || empty($arr[$key])) && $key) {//只删除为空的
                    unset($arr[$key]);
                } else {
                    if ($delKey[$k]) {//全删除
                        unset($arr[$k]);
                    }
                }
            }
        }
        return $arr;
    }
?>