In what scenarios would it be beneficial to use functions like strtolower() and strtoupper() in PHP string comparisons?

When comparing strings in PHP, it is important to consider case sensitivity. Functions like strtolower() and strtoupper() can be used to standardize the case of strings before comparison, ensuring that case differences do not affect the result of the comparison. This can be particularly useful when comparing user input, database values, or file names where the case may vary.

$string1 = "Hello";
$string2 = "hello";

// Using strtolower() to standardize case before comparison
if(strtolower($string1) === strtolower($string2)) {
    echo "Strings are equal";
} else {
    echo "Strings are not equal";
}