What are common issues when converting JSON files using PHP?

One common issue when converting JSON files using PHP is encountering errors due to malformed JSON data. To solve this issue, you can use the `json_last_error()` function to check for any JSON errors before decoding the data.

$jsonData = file_get_contents('data.json');

// Check if the JSON data is valid
if(json_last_error() === JSON_ERROR_NONE) {
    $decodedData = json_decode($jsonData, true);
    // Process the decoded JSON data
} else {
    echo 'Error decoding JSON: ' . json_last_error_msg();
}