How can syntax errors in JSON data retrieved from a database be corrected or worked around in PHP?

When encountering syntax errors in JSON data retrieved from a database in PHP, one approach is to catch and handle the error using try-catch blocks. This allows you to gracefully handle the error and potentially correct it by parsing the JSON data again. Additionally, you can use functions like json_last_error() and json_last_error_msg() to get more information about the error and take appropriate action.

try {
    $json_data = '{"key": "value"}'; // JSON data retrieved from the database
    $decoded_data = json_decode($json_data);

    if ($decoded_data === null && json_last_error() !== JSON_ERROR_NONE) {
        throw new Exception(json_last_error_msg());
    }

    // Process the decoded JSON data
    // ...
} catch (Exception $e) {
    // Handle the JSON decoding error
    echo 'Error decoding JSON data: ' . $e->getMessage();
}