What are the potential pitfalls or errors to watch out for when working with JSON data in PHP?

One potential pitfall when working with JSON data in PHP is not properly handling errors that may occur during decoding or encoding. To avoid this, always check for errors when decoding JSON data using functions like json_last_error() and json_last_error_msg(). Additionally, make sure to handle any potential errors gracefully to prevent unexpected behavior in your application.

// Example of checking for errors when decoding JSON data
$jsonString = '{"key": "value"}';
$data = json_decode($jsonString);

if (json_last_error() !== JSON_ERROR_NONE) {
    echo "Error decoding JSON: " . json_last_error_msg();
    // Handle the error appropriately
} else {
    // Proceed with using the decoded data
}