PHP实现数组根据某个字段进行水平合并，横向合并案例分析

本文实例讲述了PHP实现数组根据某个字段进行水平合并，横向合并。分享给大家供大家参考，具体如下：

PHP数组水平合并，横向合并，两条数据合并成一行

需求

将两个素组中日期相同的合并成一行

数组a

Array
(
 [0] => Array
   (
     [date] => 2019-04-02
     [today_pay_money] => 168.00
     [today_pay_num] => 1
     [yesterday_pay_money] => 999.00
     [yesterday_pay_num] => 1
   )
 [1] => Array
   (
     [date] => 2019-04-09
     [today_pay_money] => 0.01
     [today_pay_num] => 1
     [yesterday_pay_money] => 0.00
     [yesterday_pay_num] => 0
   )
 [2] => Array
   (
     [date] => 2019-05-05
     [today_pay_money] => 0.01
     [today_pay_num] => 1
     [yesterday_pay_money] => 2.00
     [yesterday_pay_num] => 1
   )
 [3] => Array
   (
     [date] => 2019-05-11
     [today_pay_money] => 0.00
     [today_pay_num] => 0
     [yesterday_pay_money] =>
     [yesterday_pay_num] => 1
   )
)

数组B

Array
(
 [0] => Array
   (
     [date] => 2019-05-07
     [today_pay_money1] => 0
     [today_pay_num1] => 0
     [yesterday_pay_money1] => 0
     [yesterday_pay_num1] => 0
   )
 [1] => Array
   (
     [date] => 2019-05-11
     [today_pay_money1] => 0
     [today_pay_num1] => 0
     [yesterday_pay_money1] => 1
     [yesterday_pay_num1] => 1
   )
)

需要格式

Array
(
 [2019-04-02] => Array
   (
     [date] => 2019-04-02
     [today_pay_money] => 168.00
     [today_pay_num] => 1
     [yesterday_pay_money] => 999.00
     [yesterday_pay_num] => 1
   )
 [2019-04-09] => Array
   (
     [date] => 2019-04-09
     [today_pay_money] => 0.01
     [today_pay_num] => 1
     [yesterday_pay_money] => 0.00
     [yesterday_pay_num] => 0
   )
 [2019-05-05] => Array
   (
     [date] => 2019-05-05
     [today_pay_money] => 0.01
     [today_pay_num] => 1
     [yesterday_pay_money] => 2.00
     [yesterday_pay_num] => 1
   )
 [2019-05-11] => Array
   (
     [date] => 2019-05-11
     [today_pay_money] => 0.00
     [today_pay_num] => 0
     [yesterday_pay_money] =>
     [yesterday_pay_num] => 1
     [today_pay_money1] => 0
     [today_pay_num1] => 0
     [yesterday_pay_money1] => 1
     [yesterday_pay_num1] => 1
   )
 [2019-05-07] => Array
   (
     [date] => 2019-05-07
     [today_pay_money1] => 0
     [today_pay_num1] => 0
     [yesterday_pay_money1] => 0
     [yesterday_pay_num1] => 0
   )
)

代码实现

先将a,b数组合并，判断当前日期下是否空，空的话直接赋值，不空的话，将已有素组和当前数组合并

$total = array_merge($a,$b));
$res = array();
foreach ($total as $k => $v) {
 if (empty($res[$v['date']]))
 $res[$v['date']] = $v;
 else
 $res[$v['date']]= array_merge($res[$v['date']],$v);
}

希望本文所述对大家PHP程序设计有所帮助。

来源：https://blog.csdn.net/flysnownet/article/details/90111860