［［0］=>［adminid =>1，group =>小组1］，［1］=>［adminid =>2，group =>小组2］，［2］=>［adminid =>2，group =>小组3］］；如何让adminid 相同的放进同一个下标？拼成这样的:［［0］=>［adminid =>1，group =>小组1］，［1］=>［［0］=>［adminid =>2，group =>小组2］，［1］=>［adminid =>2，group =>小组3］］］；
好好学习，天天向上！！！
PHP two-dimensional array splicing problem? -PHP Chinese website Q&A-PHP two-dimensional array splicing problem? -PHP Chinese website Q&A
Let’s take a look and learn.
看你的数组吧，如果数组不是很大，循环就可以了。但是数组太大，会消耗内存，需要想一些特别的办法。
public function actionTest(){ $list = []; $arr = [ ['adminid' => 1, 'group' => '小组1'], ['adminid' => 2, 'group' => '小组2'], ['adminid' => 2, 'group' => '小组3'], ]; foreach ($arr as $value) { if (isset($list[$value['adminid']])) { $list[$value['adminid']][] = $value; continue; } $list[$value['adminid']][] = $value; } unset($arr); print_r($list); }
![[Web front-end] Node.js quick start](https://img.php.cn/upload/course/000/000/067/662b5d34ba7c0227.png)
PHP two-dimensional array splicing problem? -PHP Chinese website Q&A-PHP two-dimensional array splicing problem? -PHP Chinese website Q&A
Let’s take a look and learn.
看你的数组吧，如果数组不是很大，循环就可以了。但是数组太大，会消耗内存，需要想一些特别的办法。
public function actionTest(){ $list = []; $arr = [ ['adminid' => 1, 'group' => '小组1'], ['adminid' => 2, 'group' => '小组2'], ['adminid' => 2, 'group' => '小组3'], ]; foreach ($arr as $value) { if (isset($list[$value['adminid']])) { $list[$value['adminid']][] = $value; continue; } $list[$value['adminid']][] = $value; } unset($arr); print_r($list); }