PHP实现根据数组的值进行分组的方法

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我是靠谱客的博主爱听歌墨镜，这篇文章主要介绍PHP实现根据数组的值进行分组的方法，现在分享给大家，希望可以做个参考。

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Array(
[0] => Array
(
[title] => 新闻投票分成
[gold] => +0.004095
[create_time] => 1545355432
[create_date] => 20181221
)
[1] => Array
(
[title] => 新闻投票分成
[gold] => +0.002801
[create_time] => 1545355432
[create_date] => 20181221
)
[2] => Array
(
[title] => 持币分红
[gold] => +0.837871
[create_time] => 1545194334
[create_date] => 20181219
)
)

从数据库得到的数据，想根据日期进行分组

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$list = array();
foreach($gold as $key=>$val){
$val['create_time'] = date('Y-m-d H:i:s',$val['create_time']);
$list[$val['create_date']]['time'] = $val['create_date'];
$list[$val['create_date']]['data'][] = $val;
}
$ret = array();
foreach ($list as $key => $value) {
array_push($ret, $value);
}

将得到的数组循环分组，得到数据

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Array
(
[0] => Array
(
[time] => 20181221
[data] => Array
(
[0] => Array
(
[title] => 新闻投票分成
[gold] => +0.004095
[create_time] => 2018-12-21 09:23:52
[create_date] => 20181221
)
[1] => Array
(
[title] => 新闻投票分成
[gold] => +0.002801
[create_time] => 2018-12-21 09:23:52
[create_date] => 20181221
)
[2] => Array
(
[title] => 新闻投票分成
[gold] => +0.002069
[create_time] => 2018-12-21 09:23:52
[create_date] => 20181221
)
)
)
[1] => Array
(
[time] => 20181219
[data] => Array
(
[0] => Array
(
[title] => 持币分红
[gold] => +0.837871
[create_time] => 2018-12-19 12:38:54
[create_date] => 20181219
)
)
)
)