php 两个数组取交集、并集、差集 交集：array_intersect() ``` $array1 = array(1, 2, 3, 4,); $array2 = array(4, 5, 6, 7, 8); $intersection = array_intersect($array1, $array2); ``` 并集：array_merge() ``` $array1 = array(1, 2, 3, 4,); $array2 = array(4, 5, 6, 7, 8); $merge = array_merge($array1, $array2); ``` 差集：array_diff() ``` $array1 = array(1, 2, 3, 4,); $array2 = array(4, 5, 6, 7, 8); $difference = array_diff($array1, $array2); ``` laravel 两个集合取交集、并集、差集 交集： 使用intersect()函数，用于获取两个集合的交集： ``` $collection1 = collect([1, 2, 3, 4, 5]); $collection2 = collect([4, 5, 6, 7, 8]); $intersection = $collection1->intersect($collection2); ``` 并集：使用union()函数，用于获取两个集合的并集： ``` $collection1 = collect([1, 2, 3, 4, 5]); $collection2 = collect([4, 5, 6, 7, 8]); $union = $collection1->union($collection2); ``` 差集：使用diff()函数，用于获取两个集合的差集： ``` $collection1 = collect([1, 2, 3, 4, 5]); $collection2 = collect([4, 5, 6, 7, 8]); $difference = $collection1->diff($collection2); ```