Allow upload csv file for wordpress

Function allow upload csv file for wordpres in function.php

define('ALLOW_UNFILTERED_UPLOADS', true);
function chutuoc_upload_mimes($mimes = array()) {
	// Add a key and value for the CSV file type
	$mimes['csv'] = "text/csv";
	return $mimes;
	}
add_action('upload_mimes', 'chutuoc_upload_mimes');