找出PHP中两个数组之间的公共/不常见元素 [英] Finding out the common / uncommon elements between two Arrays in PHP

问题描述

考虑一下我有两个数组：

Consider I have two arrays:

$friends = Array('foo', 'bar', 'alpha');
$attendees = Array('foo', 'bar');

现在我需要填充一个新数组 $ nonattendees 仅包含 $ friends 数组中的元素，而 $ attendees 不 >数组。即， $ nonattendees 数组应使用'alpha'填充。

Now I need to populate a new array $nonattendees which contains only the elements which are in $friends array and not in $attendees array. i.e, $nonattendees array should be populated with 'alpha'.

内置数组操作是否可用 PHP 以实现上述功能，还是应该为编写自己的循环？

Is there any in built array operation available in PHP to achieve the above functionality or should I write my own for loops?

推荐答案

array_diff 似乎

$nonattendees = array_diff($friends, $attendees);

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