Array
(
[0] => Array
(
[id] => 1
[wo_id] => 2
[evaluate_id] => 1
[type] => 分組1
[ctime] => 2016-12-02 11:39:34
)
[1] => Array
(
[id] => 2
[wo_id] => 31
[evaluate_id] => 2
[type] => 分組1
[ctime] => 2016-12-12 11:39:50
)
[2] => Array
(
[id] => 3
[wo_id] => 31
[evaluate_id] => 4
[type] => 分組2
[ctime] => 2016-12-02 11:40:01
)
[3] => Array
(
[id] => 4
[wo_id] => 2
[evaluate_id] => 5
[type] => 分組2
[ctime] => 2016-12-07 10:21:40
)
[4] => Array
(
[id] => 5
[wo_id] => 2
[evaluate_id] => 3
[type] => 分組2
[ctime] => 2016-12-07 10:21:51
)
[5] => Array
(
[id] => 6
[wo_id] => 2
[evaluate_id] => 2
[type] => 分組3
[ctime] => 2016-12-07 10:21:56
)
[6] => Array
(
[id] => 7
[wo_id] => 4
[evaluate_id] => 2
[type] => 分組3
[ctime] => 2016-12-07 10:22:10
)
)

這里是一個很典型的例子，如果我希望把數(shù)組中的數(shù)據(jù) 根據(jù) type（分組）分開處理，如果不分組，可能循環(huán)上會非常冗余，所以有了下面的一個分組函數(shù)：

　　public static function array_group_by($arr, $key)
{
$grouped = [];
foreach ($arr as $value) {
$grouped[$value[$key]][] = $value;
}
// Recursively build a nested grouping if more parameters are supplied
// Each grouped array value is grouped according to the next sequential key
if (func_num_args() > 2) {
$args = func_get_args();
foreach ($grouped as $key => $value) {
$parms = array_merge([$value], array_slice($args, 2, func_num_args()));
$grouped[$key] = call_user_func_array('array_group_by', $parms);
}
}
return $grouped;
}

$arr : 二維數(shù)組

$key: 需要分組的key

得到的結(jié)果是：

Array
(
[分組2] => Array
(
[0] => Array
(
[id] => 1
[wo_id] => 2
[evaluate_id] => 1
[ctime] => 2016-12-02 11:39:34
[type] => 分組2
)
[1] => Array
(
[id] => 2
[wo_id] => 31
[evaluate_id] => 2
[ctime] => 2016-12-12 11:39:50
[type] => 分組2
)
[2] => Array
(
[id] => 3
[wo_id] => 31
[evaluate_id] => 4
[ctime] => 2016-12-02 11:40:01
[type] => 分組2
)
)
[分組1] => Array
(
[0] => Array
(
[id] => 4
[wo_id] => 2
[evaluate_id] => 5
[ctime] => 2016-12-07 10:21:40
[type] => 分組1
)
[1] => Array
(
[id] => 5
[wo_id] => 2
[evaluate_id] => 3
[ctime] => 2016-12-07 10:21:51
[type] => 分組1
)
)
)

以上所述是小編給大家介紹的PHP 根據(jù)key 給二維數(shù)組分組，希望對大家有所幫助，如果大家有任何疑問請給我留言，小編會及時回復(fù)大家的。在此也非常感謝大家對腳本之家網(wǎng)站的支持！

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