PHP - 比较两个数组，如果有重复项删除所有匹配项

Question

I have two arrays:

foo
bar
baz

and

foo
baz

I'd like to compare these two arrays and if there are matches, remove both matches (not just duplicates) so I end up with an array like this:

bar

I know that array 1 will always contain foo , bar , and baz and that array 2 will always contain foo and baz . The entries in the array won't always be in the same order but the contents will stay the same.

Instead of comparing the two arrays I could do something like the solution of 16153948 , but that would require me to use a (almost) duplicate line for each match I want to remove since the entries are fairly unrelated (can't use regex), which doesn't seem like a good solution.

Answer 1

You could get the differences of both arrays using array_diff and then merge them using array_merge :

$res = array_merge(array_diff($a, $b), array_diff($b, $a));
print_r($res);

Php demo

Output

Array
(
    [0] => bar
)

Php demo with more different values.