Backbase Combobox + PHP

combobox-backbase.php

public function combobox($name, $values_array, $default=null, $size=300, $required=false){
    $req_bxml = ($required)? " b:required=\"true\"" : "";
    $bxml  = '<b:combobox b:width="'. $size .'px" b:name="'. $name .'" b:text="'. $default .'"'. $req_bxml .'>';
    foreach ($values_array as $value) {
        $bxml .= '<b:combo-option b:value="'. $value['value'] .'">'. $value['name'] .'</b:combo-option>';
    }
    $bxml .= '</b:combobox>';
    return $bxml;
}