regex to validate custom fields plugin

Hi All,

I need 3 regex to validate 3 custom fields:
1 regex to validte full url: http://XXXXX.TLD.
1 regex to validate a 5 digits french postcode that can start with 0.
1 regex to validate a 10 digits french phone number that a start with a 0.

Any help would be greatly appreciated.

All the best

Cyrille