Merge pull request #13 from loekvangool/patch-1

Add UTF8 support

Author: ozdemirburak

src/File/Json.php

@@ -16,7 +16,8 @@ class Json extends AbstractFile
         'enclosure' => '"',
         'escape' => '\\',
         'join' => '_',
-        'null' => null
+        'null' => null,
+        'utf8_encoding' => false
     ];
 
     /**
@@ -43,6 +44,9 @@ public function convert(): string
     protected function toCsvString(array $data): string
     {
         $f = fopen('php://temp', 'wb');
+        if($this->conversion["utf8_encoding"]) {
+          fprintf($f, chr(0xEF).chr(0xBB).chr(0xBF));
+        }
         $this->putCsv($f, array_keys(current($data)));
         array_walk($data, function ($row) use (&$f) {
             $this->putCsv($f, $row);