What are the potential pitfalls of using different character encodings in PHP applications?

Using different character encodings in PHP applications can lead to issues such as garbled text, incorrect string manipulation, and unpredictable behavior. To solve this problem, it's important to standardize on a single character encoding throughout your application. You can use functions like mb_convert_encoding() to convert strings to the desired encoding.

// Convert string to UTF-8 encoding
$encodedString = mb_convert_encoding($originalString, 'UTF-8', 'ISO-8859-1');