Use function instead of const array (compatibility with php 5.5)

Author: GuLinux

classes/FlickrCommons.php

@@ -3,12 +3,14 @@
 require_once(__DIR__.'/FlickrAPI.php');
 
 class FlickrCommons {
-    const DEFAULT_PARAMS = [
+    static function defaultParams() {
+      return [
         'display-format-photo' => 's',
         'display-format-photo-lightbox' => 'z',
         'photoset-title-tag' => 'h4',
         'photoset-description-tag' => 'h5',
         'collection-title-tag' => 'h3',
         'collection-description-tag' => 'h5'
-    ];
+      ];
+    }
 }

shortcodes/FlickrCollectionShortcode.php

@@ -17,7 +17,7 @@ public function init()
             $content = $sc->getContent();
             $id = $sc->getParameter('id', '');
             $api = new FlickrAPI();
-            $params = array_merge(FlickrCommons::DEFAULT_PARAMS, $sc->getParameters());
+            $params = array_merge(FlickrCommons::defaultParams(), $sc->getParameters());
             try {
                 $collection = $api->collection($id );
                 $output = $this->twig->processTemplate('partials/flickr-collection.html.twig', [

shortcodes/FlickrPhotoShortcode.php

@@ -17,7 +17,7 @@ public function init()
             $content = $sc->getContent();
             $id = $sc->getParameter('id', '');
             $api = new FlickrAPI();
-            $params = array_merge(FlickrCommons::DEFAULT_PARAMS, $sc->getParameters());
+            $params = array_merge(FlickrCommons::defaultParams(), $sc->getParameters());
             try {
                 $photo = $api->photo($id );
                 $output = $this->twig->processTemplate('partials/flickr-photo.html.twig', [

shortcodes/FlickrPhotosetShortcode.php

@@ -17,7 +17,7 @@ public function init()
             $content = $sc->getContent();
             $id = $sc->getParameter('id', '');
             $api = new FlickrAPI();
-            $params = array_merge(FlickrCommons::DEFAULT_PARAMS, $sc->getParameters());
+            $params = array_merge(FlickrCommons::defaultParams(), $sc->getParameters());
             try {
                 $photoset = $api->photoset($id, $params );
                 $output = $this->twig->processTemplate('partials/flickr-photoset.html.twig', [