What potential issues or errors could arise if the handleException method is not implemented correctly?

If the handleException method is not implemented correctly, potential issues could include uncaught exceptions leading to script termination, lack of proper error handling and logging, and difficulty in identifying and resolving issues in the code. To solve this, the handleException method should properly catch and handle exceptions, log errors, and possibly display user-friendly error messages.

// Implementing a proper handleException method in PHP

set_exception_handler('handleException');

function handleException($exception) {
    // Log the exception details
    error_log('Exception: ' . $exception->getMessage() . ' in file ' . $exception->getFile() . ' on line ' . $exception->getLine());
    
    // Display a user-friendly error message
    echo 'An error occurred. Please try again later.';
}