ensuring that options tags will not send array that will break the sp…

…an (#13)

src/Adapter/JaegerTracerFactory.php

@@ -46,15 +46,21 @@ public function make(string $name): Tracer
 
     private function parseConfig(): array
     {
+        $options = $this->getConfig('options', [
+            'sampler' => [
+                'type' => SAMPLER_TYPE_CONST,
+                'param' => true,
+            ],
+            'logging' => false
+        ]);
+
+        if (isset($options['tags'])) {
+            $options['tags'] = $this->sanitizeTags($options['tags']);
+        }
+
         return [
             $this->getConfig('name', 'skeleton'),
-            $this->getConfig('options', [
-                'sampler' => [
-                    'type' => SAMPLER_TYPE_CONST,
-                    'param' => true,
-                ],
-                'logging' => false,
-            ]),
+            $options
         ];
     }
 
@@ -67,4 +73,13 @@ private function getPrefix(): string
     {
         return rtrim($this->prefix . $this->name, '.') . '.';
     }
+
+    private function sanitizeTags(array $tags = []): array
+    {
+        $tagsSanitized = [];
+        foreach ($tags as $key => $value) {
+            $tagsSanitized[$key] = (is_array($value)) ? $value[0] : $value;
+        }
+        return $tagsSanitized;
+    }
 }