如果没有数据存在，如何将数组值设置为null？PHP数组设置空值

以下是我的PHP阵列和我JSON编码 -

{

"title":"Impalz-Marketing",

"type":"Business Details",

"version":"1.0",

"login":[ ],

"business":{

"1":{

"details":{ },

"messages":[ ],

"offers":[ ],

"events":[ ],

"milestone":[ ],

"products":[ ],

"brand_exp":[ ],

"reviews":[ ],

"agg_reviews":{ }

},

"168":{

"details":{ },

"messages":[ ],

"products":[ ]

}

}

}

行数是在商业不均匀。如果不存在行，如何将数据设置为null？

$data = array(

'title' => 'Impalz-Marketing',

'type' => 'Business Details',

'version' => '1.0',

'login' => $login_array,

'business' => $business_details_array

);

我已经试过这样：

$business_details_array = array();

while($row = mysql_fetch_assoc($biz_list))

{

$business_details_array[$row['id']]['details'] = $row;

}

while($row = mysql_fetch_assoc($biz_milestone))

{

if(!empty($row['id'])){

$temp= explode(',', $row['path']);

if(count($temp) > 1) {

$row['path']= $temp;

}

$business_details_array[$row['business_id']]['milestone'][] = $row;

}else{

$business_details_array[]['milestone'][] = null; // since no data exist their wont be any business_id

}

}

我想是这样的 -

{

"title":"Impalz-Marketing",

"type":"Business Details",

"version":"1.0",

"login":[ ],

"business":{

"1":{

"details":{ },

"messages":[ ],

"offers":[ ],

"events":[ ],

"milestone":[ ],

"products":[ ],

"brand_exp":[ ],

"reviews":[ ],

"agg_reviews":{ }

},

"168":{

"details":{ },

"messages":[ ],

"offers": "null",

"events": "null",

"milestone": "null",

"products":[ ],

"brand_exp": "null",

"reviews": "null",

"agg_reviews": "null"

}

}

}

+0

你可以发布更多的代码来创建数组。看起来你可能需要在while循环之前加上= null位。您应该将商业标识存储在某个地方。 $ business_details_array [$ thisBusinessId] ['milestone'] [] = null; –

+0

我已经添加了代码，在这个代码中我使用'business_id'获取所有业务列表，并且根据它进一步过滤详细信息。 –