How important is the declaration of charset=utf8 for databases in PHP applications to ensure proper handling of special characters and prevent display issues?

It is crucial to declare the charset=utf8 for databases in PHP applications to ensure proper handling of special characters and prevent display issues. This declaration ensures that the database stores and retrieves data using the UTF-8 character encoding, which supports a wide range of characters including special ones. Failure to set the charset=utf8 can lead to garbled text or incorrect display of special characters.

// Set the charset=utf8 for database connection
$pdo = new PDO('mysql:host=localhost;dbname=mydatabase;charset=utf8', 'username', 'password');
$pdo->exec("set names utf8");