php - find if an array contains an element

Question

I have an array with just a list of ids, like so:

$my_array = array(
 12, 17, 99, 23
);

Now I know I could probably do something like:

Answer 1

It's called in_array() xD

Answer 2

This might be a trick question. Anyway but how about in_array?

Answer 3

No need to create one, it is already there co-incidentally with the same name you are using: in_array too.

Example:

if (in_array('foo', $array)){
  // foo is in the array
}