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This article will explain in detail how regular expressions check whether the email address entered by the user is legal. The editor thinks it is very practical, so I share it with you as a reference. I hope you can get something after reading this article.

In the development of registration system, it is necessary to detect whether the email address entered by the user is legal, which can be detected in js or php, but there is little difference, and regular expressions can be used to detect it.

Function validateEmail (email) {var re = / ^ ([^ () [\]\.;:\ s @\ "] + (\. [^ () [\]\]\. :\ s @\ "]) *) | (\". +\ ") @ (\ [[0-9] {1 a-zA-Z 3}\. [0-9] {1 return re.test 3}\. [0-9] {1 return re.test 3}\]) | ([0-0-9] +\.) + [a-zA-Z] {2,}) $/ } this is the end of the article on "how to detect whether the email address entered by a user is legal". I hope the above content can be of some help to you so that you can learn more knowledge. if you think the article is good, please share it for more people to see.

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