diff --git a/src/Util/JsonLD.php b/src/Util/JsonLD.php
index b4ff53fdb0..878cd71e6a 100644
--- a/src/Util/JsonLD.php
+++ b/src/Util/JsonLD.php
@@ -173,7 +173,7 @@ class JsonLD
 	 *
 	 * @return array fetched element
 	 */
-	public static function fetchElementArray($array, $element, $key = '@id')
+	public static function fetchElementArray($array, $element, $key = null)
 	{
 		if (empty($array)) {
 			return null;
@@ -191,12 +191,10 @@ class JsonLD
 		$elements = [];
 
 		foreach ($array[$element] as $entry) {
-			if (!is_array($entry)) {
+			if (!is_array($entry) || (is_null($key) && is_array($entry))) {
 				$elements[] = $entry;
-			} elseif (isset($entry[$key])) {
+			} elseif (!is_null($key) && isset($entry[$key])) {
 				$elements[] = $entry[$key];
-			} elseif (!empty($entry) || !is_array($entry)) {
-				$elements[] = $entry;
 			}
 		}
 
diff --git a/tests/src/Util/JSonLDTest.php b/tests/src/Util/JSonLDTest.php
new file mode 100644
index 0000000000..94c7952b5c
--- /dev/null
+++ b/tests/src/Util/JSonLDTest.php
@@ -0,0 +1,175 @@
+<?php
+/**
+ * @copyright Copyright (C) 2020, Friendica
+ *
+ * @license GNU AGPL version 3 or any later version
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as
+ * published by the Free Software Foundation, either version 3 of the
+ * License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ *
+ */
+
+namespace Friendica\Test\src\Util;
+
+use Friendica\Util\JsonLD;
+use PHPUnit\Framework\TestCase;
+
+/**
+ * JsonLD utility test class
+ */
+class JsonLDTest extends TestCase
+{	
+	public function testFetchElementArrayNotFound()
+	{
+		$object = [];
+
+		$data = JsonLD::fetchElementArray($object, 'field');
+		$this->assertNull($data);
+	}
+
+	public function testFetchElementArrayFoundEmptyArray()
+	{
+		$object = ['field' => []];
+
+		$data = JsonLD::fetchElementArray($object, 'field');
+		$this->assertSame([[]], $data);
+	}
+
+	public function testFetchElementArrayFoundID()
+	{
+		$object = ['field' => ['value1', ['@id' => 'value2'], ['@id' => 'value3']]];
+
+		$data = JsonLD::fetchElementArray($object, 'field', '@id');
+		$this->assertSame(['value1', 'value2', 'value3'], $data);
+	}
+
+	public function testFetchElementArrayFoundID2()
+	{
+		$object = ['field' => [['subfield11' => 'value11', 'subfield12' => 'value12'],
+			['subfield21' => 'value21', 'subfield22' => 'value22'],
+			'value3', ['@id' => 'value4', 'subfield42' => 'value42']]];
+
+		$data = JsonLD::fetchElementArray($object, 'field', '@id');
+		$this->assertSame(['value3', 'value4'], $data);
+	}
+	public function testFetchElementArrayFoundArrays()
+	{
+		$object = ['field' => [['subfield11' => 'value11', 'subfield12' => 'value12'],
+			['subfield21' => 'value21', 'subfield22' => 'value22']]];
+
+		$expect = [['subfield11' => 'value11', 'subfield12' => 'value12'],
+			['subfield21' => 'value21', 'subfield22' => 'value22']];
+
+		$data = JsonLD::fetchElementArray($object, 'field');
+		$this->assertSame($expect, $data);
+	}
+
+	public function testFetchElementNotFound()
+	{
+		$object = [];
+
+		$data = JsonLD::fetchElement($object, 'field');
+		$this->assertNull($data);
+	}
+
+	public function testFetchElementFound()
+	{
+		$object = ['field' => 'value'];
+
+		$data = JsonLD::fetchElement($object, 'field');
+		$this->assertSame('value', $data);
+	}
+
+	public function testFetchElementFoundEmptyString()
+	{
+		$object = ['field' => ''];
+
+		$data = JsonLD::fetchElement($object, 'field');
+		$this->assertSame('', $data);
+	}
+
+	public function testFetchElementKeyFoundEmptyArray()
+	{
+		$object = ['field' => ['content' => []]];
+
+		$data = JsonLD::fetchElement($object, 'field', 'content');
+		$this->assertSame([], $data);
+	}
+
+	public function testFetchElementFoundID()
+	{
+		$object = ['field' => ['field2' => 'value2', '@id' => 'value', 'field3' => 'value3']];
+
+		$data = JsonLD::fetchElement($object, 'field');
+		$this->assertSame('value', $data);
+	}
+
+	public function testFetchElementType()
+	{
+		$object = ['source' => ['content' => 'body', 'mediaType' => 'text/bbcode']];
+
+		$data = JsonLD::fetchElement($object, 'source', 'content', 'mediaType', 'text/bbcode');
+		$this->assertSame('body', $data);
+	}
+
+	public function testFetchElementTypeValueNotFound()
+	{
+		$object = ['source' => ['content' => 'body', 'mediaType' => 'text/html']];
+
+		$data = JsonLD::fetchElement($object, 'source', 'content', 'mediaType', 'text/bbcode');
+		$this->assertNull($data);
+	}
+
+	public function testFetchElementTypeNotFound()
+	{
+		$object = ['source' => ['content' => 'body', 'mediaType' => 'text/html']];
+
+		$data = JsonLD::fetchElement($object, 'source', 'content', 'mediaType2', 'text/html');
+		$this->assertNull($data);
+	}
+
+	public function testFetchElementKeyWithoutType()
+	{
+		$object = ['source' => ['content' => 'body', 'mediaType' => 'text/bbcode']];
+
+		$data = JsonLD::fetchElement($object, 'source', 'content');
+		$this->assertSame('body', $data);
+	}
+
+	public function testFetchElementTypeArray()
+	{
+		$object = ['source' => [['content' => 'body2', 'mediaType' => 'text/html'],
+			['content' => 'body', 'mediaType' => 'text/bbcode']]];
+
+		$data = JsonLD::fetchElement($object, 'source', 'content', 'mediaType', 'text/bbcode');
+		$this->assertSame('body', $data);
+	}
+
+	public function testFetchElementTypeValueArrayNotFound()
+	{
+		$object = ['source' => [['content' => 'body2', 'mediaType' => 'text/html'],
+			['content' => 'body', 'mediaType' => 'text/bbcode']]];
+
+		$data = JsonLD::fetchElement($object, 'source', 'content', 'mediaType', 'text/markdown');
+		$this->assertNull($data);
+	}
+
+	public function testFetchElementTypeArrayNotFound()
+	{
+		$object = ['source' => [['content' => 'body2', 'mediaType' => 'text/html'],
+			['content' => 'body', 'mediaType' => 'text/bbcode']]];
+
+		$data = JsonLD::fetchElement($object, 'source', 'content', 'mediaType2', 'text/bbcode');
+		$this->assertNull($data);
+	}
+}