How check any value of array exist in another array php?

Question

I have two array

$a = array('a','b');
$b = array('a','1','2','3','4');

How to checks any value of array $a exists in array $b without using loop?

Ayush · Accepted Answer · 2017-08-16 15:41:11Z

63

if (count(array_intersect($array1, $array2)) === 0) {
  // No values from array1 are in array 2
} else {
  // There is at least one value from array1 present in array2
}

http://php.net/manual/en/function.array-intersect.php

Probably worth nothing that, in all likelihood, under the hood, a loop is used.

edited Aug 16, 2017 at 15:41

answered Aug 3, 2012 at 5:45

Ayush

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3 Comments

Dustin Graham Over a year ago

But, that loop is probably better than my loop.

jruzafa Over a year ago

Works great and nice solution.

n18l Over a year ago

To be fair, this statement will continue if the values of $array1 are not in $array2. You'll want to negate the comparison operator to determine if one of them is.

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