I am using Varien_File_Csv to save CSV data.

$csv = new Varien_File_Csv();
$csv->saveData($fileName, $data);

This approach always rewrites the CSV output file. Is there any way to use append method to output file instead of rewrite?

  • What do you mean by "rewrite the CSV output file" ? What is the problem exactly ? – Raphael at Digital Pianism Mar 23 '16 at 11:52
  • I reckon there's no need to extend the class, it already provides a high number of public methods to specify the CSV parameters. – Raphael at Digital Pianism Mar 23 '16 at 11:55
  • To use append mode instead of rewrite to output file. – vladPavlov Mar 23 '16 at 11:56
  • Unfortunately, there are no public methods which should be used for this purpose. – vladPavlov Mar 23 '16 at 11:59
  • 2
    I found Varien_File_Csv to not be useful at all in most cases and would recommend to use SplFileObject (or a custom solution) instead. I explained it in detail at schmengler-se.de/en/2015/03/csv-processing-with-magento – Fabian Schmengler Mar 23 '16 at 12:00

I found the solution, by extending the class Varien_File_Csv, and rewriting the method saveData to change:

$fh = fopen($file, 'w');


$fh = fopen($file, 'a');

Instead of rewriting the class you could also have done:

$csv = new Varien_File_Csv();
// Get original data
$orgData = $csv->getData($fileName);

Extending the Varien_File_Csv will do the trick. I opened mine to allow all fopen file modes

class Custom_File_Csv extends Varien_File_Csv
     * Overrides saveData function with file options
     * @param [type] $file
     * @param [type] $data
     * @param string $fileoption
     * @return void
    public function saveData($file, $data, $fileoption = 'w')
        $fh = fopen($file, $fileoption);
        foreach ($data as $dataRow) {
            $this->fputcsv($fh, $dataRow, $this->_delimiter, $this->_enclosure);
        return $this;

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