Question

PHP数组合并判断两个键值同时相等的情况 对应键值【4】数字相加

Array (
[0] => Array ( [0] => 6384 [1] => pa1 [2] => 2017041700 [3] => zhang [4] => 1982 )
[1] => Array ( [0] => 6385 [1] => 热点1 [2] => 2017041700 [3] => li [4] => 22 )
[2] => Array ( [0] => 6386 [1] => 热点1 [2] => 2017041700 [3] => li [4] => 1 )
[3] => Array ( [0] => 6387 [1] => 热点2 [2] => 2017041700 [3] => li [4] => 52 )
[4] => Array ( [0] => 6388 [1] => pa1 [2] => 2017041700 [3] => zhang[4] => 18 )
[4] => Array ( [0] => 6388 [1] => pa2 [2] => 2017041700 [3] => zhang[4] => 36 )
)
最终想要效果：对【0】键值没有要求
Array (
[0] => Array ( [0] => 6384 [1] => pa1 [2] => 2017041700 [3] => zhang[4] => 2000 )
[1] => Array ( [0] => 6385 [1] => 热点1 [2] => 2017041700 [3] => li [4] => 23 )
[3] => Array ( [0] => 6387 [1] => 热点2 [2] => 2017041700 [3] => li [4] => 52 )
[4] => Array ( [0] => 6388 [1] => pa2 [2] => 2017041700 [3] => zhang[4] => 36 )
)
哪位大神帮帮忙！谢谢啦

Answer 1

你数组的key是重复的？ 两个[4] ???

追问

不是重复的，key依次增长的 写错啦

追答

$rows = array(
     array(6384,'pa1',2017041700,'zhang',1982),
     array(6385,'热点1',2017041700,'li',22),
     array(6386,'热点1',2017041700,'li',1),
     array(6387,'热点2',2017041700,'li',52),
     array(6388,'pa1',2017041700,'zhang',18),
     array(6389,'pa2',2017041700,'zhang',36)
     );
    
     $newArr = array();
     foreach ($rows as $val)
     {
     $key = $val['1'].'_'.$val['2'].'_'.$val['3'];
    
     if(isset($newArr[$key]))
     {
     $newArr[$key]['4'] += $val['4'];
     }
     else
     {
     $newArr[$key] = $val;
     }
     }
     $newArr = array_values($newArr);
    
     print_r($newArr);