在PHP中设置数组的理论联合 [英] Set Theory Union of arrays in PHP

问题描述

在数学中有3个带有集合的运算:交集，差和并集(统一).在PHP中，我们可以对数组执行以下操作:

There are 3 operations with sets in mathematics: intersection, difference and union (unification). In PHP we can do this operations with arrays:

• 交叉点:array_intersect
• 差异:array_diff

• intersection: array_intersect
• difference: array_diff

联合的功能是什么?

结果数组中不能有重复项(如array_intersect和array_diff).

No duplicates can be in the result array (like array_intersect and array_diff).

如果索引为数字，则array_merge不会覆盖原始值，而是将其附加( PHP文档).

If indexes are numeric then array_merge will not overwrite the original value, but will be appended (PHP docs).

推荐答案

尝试array_merge:

array_unique(array_merge($array1, $array2));

PHP手册

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