Are there any syntax changes or updates in newer versions of PHP that could affect the functionality of existing scripts like a style-switcher?

In newer versions of PHP, certain deprecated functions or syntax changes could affect the functionality of existing scripts like a style-switcher. To ensure that your script continues to work properly, it's important to update any deprecated functions or syntax to their current equivalents.

// Example of deprecated function (e.g., ereg_replace)
// Update the function to its current equivalent (e.g., preg_replace)
$updated_string = preg_replace('/pattern/', 'replacement', $string);