Email addresses: easy to create, difficult to type. Note that FILTER_VALIDATE_EMAIL will validate email addresses that contain domains and top-level domains that do not exist. Fortunately, PHP (5 and later) comes with a handy set of functions and filters that make testing for email address validity a snap.Especially as you're looking for "official sources" now with your bounty. But not all address line 1's have a number, Some just have a name.eg House Name, Street Name if your happy with your regex and you just want it to accept a space.Address verification software feautures API products that are highly customizable in certain integrations.Address validation PHP, and API products are especially attractive to server-side web developers as it is possible to customize the application to their fullest advantage.This service attempts to return the exact coordinates of the location you feed it, i.e. In my experience if the address is invalid you will get a result of 602 from the service.
Class that may be used to determine if a given e-mail address is valid.It features: - Simple validation just by looking at the e-mail address string - Validation of the domain against a list of known domains that are often misspelled (typos) like those of Gmail.com, Hotmail.com, Mail.ru, Ntlworld.com, Rediffmail.com, Rocketmail.com, Yahoo.com, Yandex.com, etc.- Provides did you mean like suggestions for email addresses that were entered with typos - Validation of domain against a list of typical fake domains like test.com, testtest.com, asd.com, asdf.com, etc.. Find out if the main parts of your software are already written.I've tried a couple of regular expression patterns but its not accepting the space and this is where I need help.Here's the code I used so far: You've shared your code and you've explained what you're missing.FILTER_VALIDATE_EMAIL will erroneously balk at email addresses with long domain names (64 characters or more), and at email addresses with escaped characters (such as "me\"@example.com").