fputcsv 在我的文件中放置了重复值

我已经阅读了有关stackoverflow中描述的问题的所有主题，这些主题链接到函数中重复值的问题fputcsv。不幸的是，我正在使用PDO和psql（使用简单的mysql连接器描述了所提出的解决方案）

但首先我将描述我的问题显示一些代码。这是我放的：

$db=ConnectionFactory::CreateConnection();
$fileName = 'somefile.csv';
header("Cache-Control: must-revalidate, post-check=0, pre-check=0");
header('Content-Description: File Transfer');
header("Content-type: text/csv");
header("Content-Disposition: attachment; filename={$fileName}");
header("Expires: 0");
header("Pragma: public");

    $fh = @fopen( 'php://output', 'w' );

    $query = "SELECT * FROM person";
    $results = $db->query($q)->fetchall();
    $headerDisplayed = false;
    foreach ( $results as $data ) {
        // Add a header row if it hasn't been added yet
        if ( !$headerDisplayed ) {
            // Use the keys from $data as the titles
            fputcsv($fh, array_keys($data));
            $headerDisplayed = true;
        }
        // Put the data into the stream
        fputcsv($fh, $data);
    }
    // Close the file
    fclose($fh);
    // Make sure nothing else is sent, our file is done
    exit;

我得到CSV文件包含双精度值，例如：

"name","name","phone","phone","email","email"
"John","John","501231","501231","test","test"
"Bob","Bob","1111","1111","test2","test2"

当我尝试执行函数pg_fetch_array时出现错误：

pg_fetch_array() expect parameter 1 to be resource, array given

我该怎么做才能修复我的 csv？