Merge pull request #1561 from aneasystone/php-way

zh: Add php-the-right-way

free-programming-books-zh.md

@@ -185,6 +185,7 @@
 * [PHP5中文手册](http://php.net/manual/zh/)
 * [PHP扩展开发及内核应用](http://www.walu.cc/phpbook/preface.md)
 * [Symfony2 实例教程](http://wusuopu.gitbooks.io/symfony2_tutorial/content)
+* [PHP 之道](http://wulijun.github.io/php-the-right-way/)
 
 
 ### Python