我想按子阵列的值对数组进行分组。如果我有这样的数组:
Array
(
[0] => Array
(
[userID] => 591407753
[propertyA] => 'text1'
[propertyB] => 205
)
[1] => Array
(
[userID] => 989201004
[propertyA] =>'text2'
[propertyB] => 1407
)
[2] => Array
(
[userID] => 989201004
[propertyA] => 'text3'
[propertyB] => 1407
)
)
我想排序按照子阵列的值对这个数组进行分组,这样我就可以得到一个像这样的数组:
Array
(
[0]=>Array
(
[userID]=>59140775
[properties]=>Array
(
[0]=>text1
)
[propertyB]=>205
)
[1]=>Array
(
[userID]=>989201004
[properties]=>Array
(
[0]=>'text2'
[1]=>'text3'
)
[propertyB]=>1047
)
)
我该怎么做?
在我尝试之前:
$result = array();
foreach ($userArray as $record)
{
$id=$record['userID'];
if(isset($result[$id]))
{
$result[$id]['propertyA'][]=array($record['propertyA']);
}
else {
$record["propertyA"]=array($record['propertyA']);
unset($record['tweet']);
$result[$id]=$record;
}
}
问题出在propertyA
上。我的结果是一个额外的属性propertyA
,其表格如下:
Array
(
[0]=>Array (
[userID]=>989201004
[propertyA]=>'text2'
[properties]=>Array(
[0]=>'text2'
[1]=>'text3'
)
)
)
答案 0 :(得分:1)
以下代码应该完成这项工作。我希望这是不言自明的:
$result = array();
foreach ($array as $record) {
if (!isset($result[$record['userID']])) {
$result[$record['userID']] = array(
'userID' => $record['userID'],
'properties' => array($record['propertyA']),
'propertyB' => $record['propertyB'],
);
}
else {
$result[$record['userID']]['properties'][] = $record['propertyA'];
}
}
$result = array_values($result);