How to compare two arrays in a condition?

Question

PHP

Hello. The question may be elementary, but still.
How to do for example:
if($arSelect[ID] == $arEnter[ID]){
echo "Arrays are equal";
}else{
echo "Arrays are not equal";
}

Answer 1

php.net/manual/en/language.operators.array.php

Answer 2

array_diff can be used to compare arrays if you want to compare all elements.

$a = ['a' => 'aa', 'b' => 'bb', 'c' => 'cc', 'd' => 'dd'];
$b = ['a' => 'aa', 'b' => 'bb', 'c' => 'cc', 'd' => 'ddd'];
if($c = array_diff($a,$b)) {
    print_r($c);
}