Add examples

README.md

@@ -15,8 +15,28 @@ This yocLibrary enables your project to encode and decode OEmbed data in PHP.
 
 ### Encoding
 
-TODO
+```php
+use YOCLIB\OEmbed\OEmbed;
+
+$data = [
+    'version' => '1.0',
+];
+
+$json = OEmbed::encode($data,'json');
+// or
+$xml = OEmbed::encode($data,);
+```
 
 ### Decoding
 
-TODO
+```php
+use YOCLIB\OEmbed\OEmbed;
+
+$json = '{"version":"1.0"}';
+$data = OEmbed::decode($json,'json');
+
+// or
+
+$xml = '<oembed><version>1.0</version></oembed>';
+$data = OEmbed::decode($xml);
+```

src/OEmbed.php

@@ -74,6 +74,9 @@ public static function encodeJSON(array $data): ?string{
     public static function encodeXML(array $data): ?string{
         self::ensureValidData($data);
         $doc = new DOMDocument;
+        $doc->encoding = 'UTF-8';
+        $doc->xmlStandalone = true;
+        $doc->xmlVersion = '1.0';
         $doc->append($doc->createElement('oembed'));
         $arr = (array) $data;
         foreach($arr as $key=>$val){

tests/OEmbedTest.php

@@ -32,7 +32,7 @@ public function testEncode(){
             'width' => 456,
         ];
         $json = '{"version":"1.0","type":"photo","height":123,"width":456}';
-        $xml = "<?xml version=\"1.0\"?>\n<oembed><version>1.0</version><type>photo</type><height>123</height><width>456</width></oembed>\n";
+        $xml = "<?xml version=\"1.0\" encoding=\"UTF-8\" standalone=\"yes\"?>\n<oembed><version>1.0</version><type>photo</type><height>123</height><width>456</width></oembed>\n";
 
         self::assertEquals($json,OEmbed::encode($data,'json'));
         self::assertEquals($xml,OEmbed::encode($data));