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<?php /** * Definition that allows a set of elements, and allows no children. * @note This is a hack to reuse code from HTMLPurifier_ChildDef_Required, * really, one shouldn't inherit from the other. Only altered behavior * is to overload a returned false with an array. Thus, it will never * return false. */ class HTMLPurifier_ChildDef_Optional extends HTMLPurifier_ChildDef_Required { /** * @type bool */ public $allow_empty = true; /** * @type string */ public $type = 'optional'; /** * @param array $children * @param HTMLPurifier_Config $config * @param HTMLPurifier_Context $context * @return array */ public function validateChildren($children, $config, $context) { $result = parent::validateChildren($children, $config, $context); // we assume that $children is not modified if ($result === false) { if (empty($children)) { return true; } elseif ($this->whitespace) { return $children; } else { return array(); } } return $result; } } // vim: et sw=4 sts=4