The idea of ​​adding keywords and links in the article and the implementation of PHP

Sometimes, we need to add links to keywords in the article. Ordinary text can be replaced with strings, but when there are html tags and when one keyword contains another keyword.

Use regular matching? I tried writing quite a few, but none of them achieved a very good effect. Until I found an article http://www.01happy.com/content-keyword-and-php-practice/ This article has made some modifications to better meet my own needs
Example download address: http://download .csdn.net/detail/wukangding/8488387

The above introduces the idea of ​​adding keywords and links in the article and the implementation of PHP, including the relevant content. I hope it will be helpful to friends who are interested in PHP tutorials.