JSON Text to CSV

json2csv.php

$json_obj = json_decode($json, false);
ob_start();
$fp = fopen('php://output', 'w');
$header_included = false;
foreach ($json_obj as $lines) {
    if ($header_included === false) {
        fputcsv($fp, array_keys((array) $lines));
        $header_included = true;
    }
    $line = array();
    foreach ($lines as $key => $fields) {
        $value = '';
        if (is_array($fields)) {
            $value = implode(',', $fields);
        } else {
            $value = $fields;
        }
        array_push($line, $value);
        pg_raise('notice', $value);
    }
    fputcsv($fp, $line);
}
fclose($fp);
return ob_get_clean();