Why does in_array() wrongly return true with these (large numeric) strings?

Question

I am not getting what is wrong with this code. It\'s returning \"Found\", which it should not.

$lead = \"418176000000069007\";
$diff = array(\"41817600000006         


        

Answer 1

It's because of one defect in PHP. 418176000000069007 is modified to 2147483647 (integer limit of PHP). That is why you are getting Found.

try in_array($lead, $diff, true)

If the third parameter strict is set to TRUE then the in_array() 
function will also check the types of the needle in the haystack.