php checking array for number

Question

Whats the easiest and quickest way to loop through an array of numbers and find out if $val is in there?

Say my array is $numbers(3,5,78,35,78) and my $val=5, it would return true.

Answer 1

Maybe in_array()?

if (in_array($val, $numbers)) {
  // Do something
}

No looping required

Answer 2

If you don't care about the position of your number, you could use in_array()