public function getCsv(Varien_Data_Collection $collection, $getAll = false)
{
$csv = '';
$collectionData = $collection->toArray();
$type = $collection->getEntity()->getType();
// first pass, collect header
$_columns = array();
$_ignoredColumns = array();
// speedup
foreach ($collectionData as $item) {
foreach ($item as $key => $value) {
if (gettype($value) == 'Array') {
$_ignoredColumns[] = $key;
}
if ($getAll) {
$_columns[] = $key;
} else {
if (!in_array($key, $_columns) && !in_array($key, $_ignoredColumns)) {
$attr = Mage::getModel('eav/entity_attribute')->loadByCode($type, $key);
// get rid of non-attributes
if (!count($attr->getData())) {
$_ignoredColumns[] = $key;
} else {
$_columns[] = $key;
}
}
}
}
}
$data = array();
// add headers as first row
foreach ($_columns as $column) {
$data[] = "\"{$column}\"";
}
$csv .= implode(',', $data) . "\n";
// second pass, concatenate data content
foreach ($collectionData as $item) {
$data = array();
foreach ($_columns as $column) {
$data[] = '"' . str_replace(array('"', '\\'), array('""', '\\\\'), $item[$column]) . '"';
}
$csv .= implode(',', $data) . "\n";
}
return $csv;
}