Checking if email is valid

[Mats Wichmann]

On 11/5/23 10:34, Grant Edwards via Python-list wrote:

> Indeed. There is a tiny but brightly burning kernel of hate in my
> heart for web sites (and their developers) that refuse to accept
> credit card numbers entered with spaces _as_they_are_shown_on_the_card_!
> 
> I've concluded that using PHP causes debilitating and irreversible
> brain damage.

I think it's the attitude that speed of deployment is more important 
than any other factor, rather than just PHP :-)  Plus a bunch of that 
stuff is also coded in the front end (aka Javascript).

Phone numbers.
Credit card numbers.
Names (in my case - my wife has a hypenated surname which is almost as 
deadly as non-alpha characters in a name which was already mentioned in 
this diverging thread)

and addresses.  living rurally we have two addresses: a post office 
rural route box for USPS and a "street address" for anyone else.  The 
former looks like "{locationID} Box {number}".  The single word "Box" 
often triggers "we don't deliver to P.O. Boxes" - it's not a PO Box, and 
it's the only address USPS will deliver to, so get over yourself.  Or 
triggers fraud detection alerts, because "billing address" != "shipping 
address".

it's astonishing how bad so many websites are at what should be a 
fundamental function: taking in user-supplied data in order to do 
something valuable with it.