What are some potential pitfalls of using string comparisons in PHP for data representation?

One potential pitfall of using string comparisons in PHP for data representation is that they can be case-sensitive, leading to inconsistencies in comparisons. To solve this issue, you can use case-insensitive string comparison functions like `strcasecmp()` or convert both strings to lowercase before comparing them using `strtolower()`.

// Case-insensitive string comparison using strcasecmp()
$string1 = "Hello";
$string2 = "hello";

if (strcasecmp($string1, $string2) === 0) {
    echo "Strings are equal";
} else {
    echo "Strings are not equal";
}