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

Try using brackets and use strict mode:

$lead = "418176000000069007";
$diff = array("418176000000069003","418176000000057001");

if(in_array($lead, $diff, true)) {
    echo "Found";
} else {
    echo "Not found";
}