How can PHP developers handle case-insensitive string comparisons effectively?

When handling case-insensitive string comparisons in PHP, developers can use the strtolower() function to convert both strings to lowercase before comparing them. This ensures that the comparison is case-insensitive and accurate.

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

if (strtolower($string1) === strtolower($string2)) {
    echo "The strings are equal.";
} else {
    echo "The strings are not equal.";
}