Hi, I'm using the following Regex Syntax to validate a UK postcode:

the validation works fine but i need to allow only Postcodes inside London and my question is how can i run a separate validation on same texbox field.

these are the postcodes allowed:
N1 to N22
NW1 to NW11
W1 to W14
EC1, EC2, EC3, EC4, WC1, WC2
E1 to E18
SE1 to SE28
SW1V, SW1X, SW1P, SW1H, SW1E, SW1A, SW1Y, SW1W, SW1 to SW20
HA0 to HA9
EN1 to EN8

and i was thinking to check the first 2 character entered and see if it match the above and if not return a error message.
any help appreciated.
thanks

Why not create your own custom validation rule ? Instructions available here:

https://www.rsjoomla.com/support/documentation/rsform-pro/customizing-rsform-pro/custom-validation-rules.html

Hi, Thanks for reply. I managed to get a new Regex that checks that the Postcode is inside London. I'm not sure how can I check the postcode against 2 Regex.

The regex rules can be combined, but it does require a pretty good understanding of these. Personally i would still recommend going for a custom validation rule (you can use the existing regex definitions to combine them in a single validation rule).

I tried with custom validation but I don't really know how that works. Do you offer paid customisation?
It's hard to find developer who specialise in RSForm.

RSJoomla! does not provide customization services.