Email verification, email verification website

Email verification, email verification website

Today, I read a piece of code about email verification. If I forget it, I wrote it and shared it with you.

<! DOCTYPE html> 






How to verify the email address using a regular expression
^ ([A-zA-Z0-9 _ \. \-]) + \ @ ([a-zA-Z0-9 \-]) + \.) + ([a-zA-Z0-9] {2, 4}) + $

Regular Expression to verify the validity of the email address
/^ ([A-zA-Z0-9 _-]) + @ ([a-zA-Z0-9 _-]) + (\. [a-zA-Z0-9 _-]

/^ ([A-zA-Z0-9 _-]) is a string that represents the @ symbol, which consists of lowercase letters, uppercase letters, numbers, underscores, and hyphens
([A-zA-Z0-9 _-]) is a string after the @ symbol is composed of lowercase letters, uppercase letters, numbers, underscores, strikethroughs of multiple characters
\. [A-zA-Z0-9 _-] represents a string consisting of black spots and lowercase letters, uppercase letters, numbers, underscores, and hyphens
/^ Indicates multiple