How to use PHP to regularly match Chinese and English, numbers and underscores

This article mainly explains "how to use PHP regular matching Chinese and English, numbers and underscores", interested friends may wish to take a look. The method introduced in this paper is simple, fast and practical. Let's let Xiaobian take you to learn "PHP how to use regular matching Chinese and English, numbers and underscores"!

I. Question:

The user name required for user registration shall consist of Chinese, English, numbers or underscores, and shall not contain other characters.

II. Solution:

For input characters, regular validation of Chinese and English, numbers and underscores can be performed.

The code is as follows:

$username='jb51.net@#……^&*';$preg='/[\w\x{4e00}-\x{9fa5}]+/u';//$preg='/[\x80-\xff_\w]+/u';preg_match($preg,$username,$arr);print_r($arr);

Run Results:

Array( [0] => jb51) At this point, I believe that everyone has a deeper understanding of "how to match Chinese, English, numbers and underscores with regular PHP". Let's actually operate it! Here is the website, more related content can enter the relevant channels for inquiry, pay attention to us, continue to learn!