What are some common pitfalls when using base_convert in PHP for converting number systems?

One common pitfall when using base_convert in PHP is that it may not handle large numbers correctly due to limitations in the underlying integer representation. To solve this issue, you can use the BCMath extension in PHP, which provides arbitrary precision arithmetic functions.

$num = "12345678901234567890";
$base10 = base_convert($num, 10, 16); // Incorrect result due to integer limitations
$base10_correct = bcdechex($num); // Correctly converts large numbers to hexadecimal using BCMath extension
echo $base10_correct;