相同数组的组合为新数组
程序员文章站
2022-06-06 16:49:59
...
array (size=2)
'id' => int 139
'key' => string '11111'
array (size=2)
'id' => int 139
'key' => string '22222'
array (size=2)
'id' => int 159
'key' => string '33333'
array (size=2)
'id' => int 159
'key' => string '44444'
合并为
array (size=2)
'id' => int 139
'key' => string '11111，22222'
array (size=2)
'id' => int 159
'key' => string '33333，44444'
回复内容：
array (size=2)
'id' => int 139
'key' => string '11111'
array (size=2)
'id' => int 139
'key' => string '22222'
array (size=2)
'id' => int 159
'key' => string '33333'
array (size=2)
'id' => int 159
'key' => string '44444'
合并为
array (size=2)
'id' => int 139
'key' => string '11111，22222'
array (size=2)
'id' => int 159
'key' => string '33333，44444'
$arr = [
["id"=>139, "key"=>"111"],
["id"=>139, "key"=>"222"],
["id"=>159, "key"=>"333"],
["id"=>159, "key"=>"444"]
];
$res = [];
foreach( $arr as $item ) $res[ $item['id'] ][] = $item['key'];