Regular expression detects whether the email address entered by the user is valid _ regular expression

Source: Internet
Author: User
In the registration system development, the need to detect the user input email address is legitimate, can be detected in JS or PHP, but the difference is not small, can use regular expression to detect.

Here is an example of JS:
Copy Code code as follows:

function Validateemail (email) {
var re =/^ ([^<> () [\]\\.,;:\ S@\ "]+ (\.[ ^<> () [\]\\.,;:\ S@\ "]+" *) | (\
". +\")) @ (\[[0-9]{1,3}\. [0-9] {1,3}\. [0-9] {1,3}\. [0-9] {1,3}\]) | ([A-za
-z\-0-9]+\.) +[a-za-z]{2,})) $/;
return re.test (email);

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