检查两个数组中的任何匹配[重复]

Question

This question already has an answer here:

• Checking if 2 arrays have at least 1 equal value 1 answer

I have array like this

a1 = {1,3,5,7,9};
a2 = {2,4,6,8,9};

In both the arrays, there is a common value 9. I would like to know if there is a built in php function present which returns true or false if at least one value matches or not.

Thanks

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Answer 1

You could use array_intersect

$a1 = [1,3,5,7,9];
$a2 = [2,4,6,8,9];
$a3 = [10];

array_intersect($a1,$a2) ? true : false;
// => true

array_intersect($a1,$a3) ? true : false;
// => false