问个PHP数组合并的有关问题~请
问个PHP数组合并的问题~请高手指点
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
)
);
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
)
)