What are the potential pitfalls of using ISO-8859 encoding in PHP, and how can they be avoided?

Using ISO-8859 encoding in PHP can lead to character encoding issues, especially when working with multi-byte characters or non-Latin scripts. To avoid these pitfalls, it's recommended to use UTF-8 encoding instead, which supports a wider range of characters and is more compatible with modern web standards.

// Set the default character encoding to UTF-8
ini_set('default_charset', 'UTF-8');