up readme

inhere · inhere · commit 2e00c27decfd · 2020-06-11T21:14:10.000+08:00
diff --git a/README.md b/README.md
@@ -6,6 +6,11 @@
 
 Some useful system utils for php
 
+- exec system command
+- simple process usage
+- php env info
+- error and exception info
+
 ## Install
 
 ```bash
