如何使用PHP / Zend Framework1以流形式获取数据库结果

Question

I'm writing a CSV file with the results from a function that returns database query results as an array, and getting memory out of exception if the result set is large.

So I'm looking for writing CSV using streams, can anyone help me how to do this using PHP or Zend Framework-1.

Answer 1

You have to change your function to return a statement , not full results. You can use fetch method to get database results per-row and fputcsv to write into a csv file.

$fp = fopen('file.csv', 'w');
$stmt = $db->query('SELECT * FROM table WHERE smth IS NOT NULL ORDER BY id DESC');

while ($row = $stmt->fetch()) {
    fputcsv($fp, $fields);
}

fclose($fp);