Update README.md

Author: wxxiong6

README.md

@@ -1,2 +1,20 @@
 # php-ext-arraylist
 php扩展ArrayList
+
+## linux mac 环境下编译安装
+```shell
+phpize
+./configure --enable-arraylist
+make 
+make install
+```
+
+支持函数
+```php
+$ret = new ArrayList();
+$ret->add(1);
+$ret->get(0);
+$ret->count();
+$ret->getSize();
+$res->toArray();
+```