How to apply in_array for mutidimensional array

Question

$categories => Array([0] => Jewelry & Accessories,[1] => Pet Care)
$categories_master => Array([0] => Jewelry & Accessories,[1] => Apparel,[2] => Beauty & Fragrance)

I have two arrays like above,

I have to check like this in_array($categories,$categories_master), I know it wont work but I need to return 1 or true for anyone match with $categories_master array

Can you better describe the output you want to receive? [`array_intersect()`](http://php.net/manual/en/function.array-intersect.php) may be very close to what you need. — Michael Berkowski, Dec 10 '14 at 19:54
So if any one item matches, return `true`? Use `array_intersect()` and verify that the `count() >= 1` — Michael Berkowski, Dec 10 '14 at 19:57
It seems you are not really asking about multidimensional arrays, but rather multiple 1-dimension arrays. — Michael Berkowski, Dec 10 '14 at 19:58
To avoid confusion, can you please specify what the output should be for your example above? Should it be `true` or `array(true, false)` — ymas, Dec 10 '14 at 19:59
possible duplicate of [in\_array() and multidimensional array](http://stackoverflow.com/questions/4128323/in-array-and-multidimensional-array) — Edwin, Dec 10 '14 at 20:11
@SimplyDread Nope, that isn't what's being asked, despite the title — Michael Berkowski, Dec 10 '14 at 20:12

score 2 · Accepted Answer · edited Dec 10 '14 at 21:03

Do the array_intersect ( returns an array containing all the values of $categories that are present in $categories_master ), and cast to boolean. If return array has items it will return true, or false otherwise.

(bool) array_intersect( $categories, $categories_master );

Also this will evaluate to true if the returned array is not empty, false for empty array:

if(array_intersect( $categories, $categories_master )) {
    //there are one or more matches
}

How to apply in_array for mutidimensional array

1 Answers1