How add more than 13 digits in EAN13 - PS 1.6.1.13

[seog]

Hello 

 

Due I need use other field how third reference I tried many options unsucesfully to can add more than 13 words in ean13 backoffice product tab, options such as:

 

classes/Product.php

'ean13' =>                 array('type' => self::TYPE_STRING, 'validate' => 'isReference', 'size' => 64),

and:

Phpmyadmin

Changing in Mysql Database EAN13 VARCHAR Length to 64 in ps_product, ps_product_attribute and ps_stock

and:

classes/Validate.php

public static function isEan13($ean13)
    {
        return !$ean13 || preg_match('/^[0-9]{0,64}$/', $ean13);
    }

or:

classes/Validate.php

public static function isEan13($ean13)
    {
        return preg_match(Tools::cleanNonUnicodeSupport('/^[^<>;={}]*$/u'), $ean13);
    }

Any suggestion??

[seog]

No one ever helps in this forum?