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怎么在PHP中根據(jù)key對二維數(shù)組進行分組?針對這個問題,這篇文章詳細介紹了相對應的分析和解答,希望可以幫助更多想解決這個問題的小伙伴找到更簡單易行的方法。
先來看以下數(shù)組,
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 ) ) )
關于怎么在PHP中根據(jù)key對二維數(shù)組進行分組問題的解答就分享到這里了,希望以上內(nèi)容可以對大家有一定的幫助,如果你還有很多疑惑沒有解開,可以關注億速云行業(yè)資訊頻道了解更多相關知識。
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