add examples

README.md

@@ -9,3 +9,66 @@ This library is lightweight, object-oriented [Gemtext](https://geminiprotocol.ne
 ``` bash
 composer require yggverse/gemtext:dev-main
 ```
+
+## Examples
+
+### Parse existing document
+
+``` php
+// Load document from file
+$document = new \Yggverse\Gemtext\Document(
+    file_get_contents(
+        'tests/data/document.gmi'
+    )
+);
+
+// Get links
+foreach ($document->getLinks() as $link)
+{
+    print(
+        $link->toString()
+    );
+}
+```
+
+### Make new document
+
+``` php
+// Init new document
+$document = new \Yggverse\Gemtext\Document;
+
+// Append header
+$document->append(
+    new \Yggverse\Gemtext\Entity\Header(
+        'Hello world'
+    )
+);
+
+// Init new link
+$link = new \Yggverse\Gemtext\Entity\Link(
+    'gemini://geminiprotocol.net',
+    'The Gemini Program',
+    '1965-01-19'
+);
+
+// Change link date
+$link->setDate(
+    date('Y-m-d')
+);
+
+// Append link to document
+$document->append(
+    $link
+);
+
+// Get gemtext result
+print(
+    $document->toString()
+);
+
+// Save to file
+file_put_contents(
+    '/path/to/file.gmi',
+    $document->toString()
+)
+```