Added JSON and Encoding examples

POST json data to your.custom.api in utf-8 encoding

_posts/api/webpage/method/2000-01-01-open.md

@@ -8,6 +8,7 @@ permalink: api/webpage/method/open.html
 `open(url, callback)` {void}
 `open(url, method, callback)` {void}
 `open(url, method, data, callback)` {void}
+`open(url, settings, callback)` {void}
 
 Opens the `url` and loads it to the page. Once the page is loaded, the optional `callback` is called using `page.onLoadFinished`, and also provides the page status to the function (`'success'` or `'fail'`).
 
@@ -40,7 +41,28 @@ page.open('http://www.google.com/', 'POST', postBody, function(status) {
 });
 ```
 
-
+### POST json data to your.custom.api in utf-8 encoding
+As of PhantomJS 1.9, the open function can get an object of settings. and with a use of "encoding" key, you can set the custom encoding to your app.
+In this example, we've set the encoding to `UTF8`, and set the `Content-Type` header to `application/json` for making our server know the request has information in `json` format and not in `urlencoded` format.
+
+```javascript
+var webPage = require('webpage');
+var page = webPage.create();
+var data = {
+  some: "data",
+  another: ["custom", "data"]
+};
+
+page.open('http://your.custom.api', {
+  data: data,
+  encoding: "utf8",
+  headers: {
+    "Content-Type": "application/json"
+  }
+}, function(status) {
+  console.log('Status: ' + status);
+  // Do other things here...
+});