src/widget/ActiveForm.php
public function endField()
    {
        $field = array_pop($this->_fields);
        if ($field instanceof ActiveField) {
            return $field->end();
        } else {
            throw new InvalidCallException('Mismatching endField() call.');
        }
    }
public function endField()
    {
        $field = array_pop($this->_fields);
        if ($field instanceof ActiveField) {
            return $field->end();
        } else {
            throw new InvalidCallException('Mismatching endField() call.');
        }
    }
Ends a form field.
This method will return the closing tag of an active form field started by [[beginField()]].
@return string the closing tag of the form field
@throws InvalidCallException if this method is called without a prior [[beginField()]] call.