Validate a french form number in almost any format http://www.lije-creative.com/prestashop-accepter-numeros-telephone-internationaux/
return preg_match('/^[0-9][1-9][0-9]{3}$/', $postcode);
return preg_match('/^(0|\+330|0033|\+33[-. ]?0|\+33|\(\+33\)[-. ]?0)[1-9](([-][0-9]{2}){4}|([0-9]{2}){4}|([.][0-9]{2}){4}|([ ][0-9]{2}){4})$/', $phone);