Merge pull request #35 from heyanlong/master

add uses

README.md

@@ -14,4 +14,11 @@ SkyWalking PHP is the PHP instrumentation agent, which is compatible with [Apach
 * Submit an issue
 * Mail list: dev@skywalking.apache.org
 * [Gitter](https://gitter.im/openskywalking/Lobby)
-* QQ Group: 392443393
+* QQ Group: 392443393
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+
+# Who Uses SkyWalking-PHP ?
+
+
+A wide variety of companies and organizations use SkyWalking-PHP for research, production and commercial product. Here is the **User Wall** of SkyWalking-PHP.
+
+![Who Uses SkyWalking-PHP](./who-uses.jpg)
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