sintonia/airtime_mvc/application/forms/AddShowRepeats.php

<?php

class Application_Form_AddShowRepeats extends Zend_Form_SubForm
{

    public function init()
    {
        //Add type select
        $this->addElement('select', 'add_show_repeat_type', array(
            'required' => true,
            'label' => _('Repeat Type:'),
            'class' => ' input_select',
            'multiOptions' => array(
                "0" => _("weekly"),
                "1" => _("bi-weekly"),
                "2" => _("monthly")
            ),
        ));

        // Add days checkboxes
        $this->addElement(
            'multiCheckbox',
            'add_show_day_check',
            array(
                'label' => _('Select Days:'),
                'required' => false,
                'multiOptions' => array(
                    "0" => _("Sun"),
                    "1" => _("Mon"),
                    "2" => _("Tue"),
                    "3" => _("Wed"),
                    "4" => _("Thu"),
                    "5" => _("Fri"),
                    "6" => _("Sat"),
                ),
         ));

        // Add end date element
        $this->addElement('text', 'add_show_end_date', array(
            'label'      => _('Date End:'),
            'class'      => 'input_text',
            'value'     => date("Y-m-d"),
            'required'   => false,
            'filters'    => array('StringTrim'),
            'validators' => array(
                'NotEmpty',
                array('date', false, array('YYYY-MM-DD'))
            )
        ));

        // Add no end element
        $this->addElement('checkbox', 'add_show_no_end', array(
            'label'      => _('No End?'),
            'required'   => false,
            'checked' => true,
        ));
    }

    public function disable()
    {
        $elements = $this->getElements();
        foreach ($elements as $element) {
            if ($element->getType() != 'Zend_Form_Element_Hidden') {
                $element->setAttrib('disabled','disabled');
            }
        }
    }

    public function checkReliantFields($formData)
    {
        if (!$formData['add_show_no_end']) {
            $start_timestamp = $formData['add_show_start_date'];
            $end_timestamp = $formData['add_show_end_date'];

            $start_epoch = strtotime($start_timestamp);
            $end_epoch = strtotime($end_timestamp);

            if ($end_epoch < $start_epoch) {
                $this->getElement('add_show_end_date')->setErrors(array(_('End date must be after start date')));

                return false;
            }
        }

        return true;
    }

}