就是把键和值都移除..
foreach($arr as $k => $v ) { if($v>10) 删除arr[$k] }
$arr = [ 'test' => 'test', 'test1' => 'test1'];unset($arr['test'])print_r($arr);#####输出[ 'test1' => 'test1']
![[Web front-end] Permulaan pantas Node.js](https://img.php.cn/upload/course/000/000/067/662b5d34ba7c0227.png)
$arr = [ 'test' => 'test', 'test1' => 'test1'];unset($arr['test'])
print_r($arr);#####输出[ 'test1' => 'test1']