PHP: Built-in function to check whether two Array values are equal ( Ignoring the Order)

Question

Is there a built-in function for PHP for me to check whether two arrays contain the same values ( order not important?).

For example, I want a function that returns

Answer 1

array_diff looks like an option:

function array_equal($a1, $a2) {
  return !array_diff($a1, $a2) && !array_diff($a2, $a1);
}

or as an oneliner in your code:

if(!array_diff($a1, $a2) && !array_diff($a2, $a1)) doSomething();