php: check if an array has duplicates

Question

I\'m sure this is an extremely obvious question, and that there\'s a function that does exactly this, but I can\'t seem to find it. In PHP, I\'d like to know if my array has

Answer 1

$hasDuplicates = count($array) > count(array_unique($array)); 

Will be true if duplicates, or false if no duplicates.