Are there any potential pitfalls or limitations to consider when using JSON in PHP?

One potential limitation to consider when using JSON in PHP is the possibility of encountering errors when encoding or decoding data that contains special characters or invalid UTF-8 sequences. To address this issue, you can use the `json_last_error()` function to check for any errors after encoding or decoding JSON data.

// Encode data to JSON
$json_data = json_encode($data);

// Check for encoding errors
if (json_last_error() !== JSON_ERROR_NONE) {
    // Handle error
    echo 'JSON encoding error: ' . json_last_error_msg();
}

// Decode JSON data
$decoded_data = json_decode($json_data);

// Check for decoding errors
if (json_last_error() !== JSON_ERROR_NONE) {
    // Handle error
    echo 'JSON decoding error: ' . json_last_error_msg();
}