PHP: generate CSV

csv.php

<?php
function toCSV(array $data, array $colHeaders = array(), $asString = false) {
	$stream = ($asString)
	    ? fopen("php://temp/maxmemory", "w+")
	    : fopen("php://output", "w");  

	if (!empty($colHeaders)) {
		fputcsv($stream, $colHeaders);
	}

	foreach ($data as $record) {
		fputcsv($stream, $record);
	}

	if ($asString) {
		rewind($stream);
		$returnVal = stream_get_contents($stream);
		fclose($stream);
		return $returnVal;
	}
	else {
		fclose($stream);
	}
}