oxrequiredfieldvalidator.php

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<?php

class oxRequiredFieldValidator
{

    public function validateFieldValue($sFieldValue)
    {
        $blValid = true;
        if (is_array($sFieldValue)) {
            $blValid = $this->_validateFieldValueArray($sFieldValue);
        } else {
            if (!trim($sFieldValue)) {
                $blValid = false;
            }
        }

        return $blValid;
    }

    private function _validateFieldValueArray($aFieldValues)
    {
        $blValid = true;
        foreach ($aFieldValues as $sValue) {
            if (!trim($sValue)) {
                $blValid = false;
                break;
            }
        }

        return $blValid;
    }
}