diff --git a/README.md b/README.md
index 8ed19fb..dcfea91 100644
--- a/README.md
+++ b/README.md
@@ -56,6 +56,7 @@
 
 ### PHP
 
+* [PHP调试技术手册](http://www.laruence.com/2010/06/21/1608.html)(PDF)
 * [PHP之道](https://github.com/wulijun/php-the-right-way)
 * [PHP 最佳实践](https://github.com/justjavac/PHP-Best-Practices-zh_CN)
 * [深入理解PHP内核](https://github.com/reeze/tipi)