WP-MEMBERS plugin

Fatal error: Call to undefined function str_getcsv() in /home/skim89/public_html/wp-content/plugins/wp-members/admin/tab-fields.php on line 206

Im trying to create a new dropdown field but this fatal error keeps appearing. I checked line 206 which says “$arr[7] = str_getcsv( $str, ‘,’, ‘”‘ );” HELP!