问个php数组合并的问题~请高手指点
$arr1=array(
0=>array(
'id' => '2',
'b' => 0,
'num' => 4
),
1=>array(
'id' => '1',
'b' => 0,
'num' => 4
)
);
$arr2=array(
1=>array(
'id' => '3',
'b' => 0,
'num' => 4
),
2=>array(
'id' => '2',
'b' => 0,
'num' => 4
)
);
想要合并这个两个数组，判断条件，id,b两个元素都相同的情况的num值相加。新数组键值重新排列0 1 2 3
求高手指点。谢谢。
------解决思路----------------------
$arr1=array(
0=>array(
'id' => '2',
'b' => 0,
'num' => 4
),
1=>array(
'id' => '1',
'b' => 0,
'num' => 4
)
);
$arr2=array(
1=>array(
'id' => '3',
'b' => 0,
'num' => 4
),
2=>array(
'id' => '2',
'b' => 0,
'num' => 4
)
);
foreach($arr1 as $v) $res[$v[id]_$v[b]] = $v;
foreach($arr2 as $v)
if(isset($res[$v[id]_$v[b]])) $res[$v[id]_$v[b]]['num'] += $v['num'];
else $res[$v[id]_$v[b]] = $v;
print_r(array_values($res));
array
(
[0] => array
(
[id] => 2
[b] => 0
[num] => 8
)
[1] => array
(
[id] => 1
[b] => 0
[num] => 4
)
[2] => array
(
[id] => 3
[b] => 0
[num] => 4
)
)