1. Introduction_PHP Tutorial

1. Introduction
At present, regular expressions have been widely used in many software, including *nix (Linux, Unix, etc.), HP and other operating systems, PHP, C#, Java and other development environments, as well as many application software , you can see the shadow of regular expressions.
The use of regular expressions can achieve powerful functions in a simple way. In order to be simple and effective yet powerful, the regular expression code is more difficult and not easy to learn, so it requires some effort. After getting started, it is relatively simple and effective to use it by referring to certain references.
Example:

http://www.bkjia.com/PHPjc/445152.htmlwww.bkjia.comtruehttp: //www.bkjia.com/PHPjc/445152.htmlTechArticle1. Introduction At present, regular expressions have been widely used in many software, including *nix (Linux, Unix, etc.), HP and other operating systems, PHP, C#, Java and other development environments, and many...