Make CommonDreamsExtractContent member function

This fixes error "Using $this when not in object context"

Nested functions are not part of the object and therefore don't have
access to the object instance $this!

bridges/CommonDreamsBridge.php

@@ -7,18 +7,10 @@ class CommonDreamsBridge extends BridgeAbstract{
 			$this->name = "CommonDreams Bridge";
 			$this->uri = "http://www.commondreams.org/";
 			$this->description = "Returns the newest articles.";
-			$this->update = "2015-04-03";
+			$this->update = "2016-08-02";
 
 		}
 
-        public function collectData(array $param){
-
-		function CommonDreamsUrl($string) {
-		 $html2 = explode(" ", $string);
-		 $string = $html2[2] . "/node/" . $html2[0];
-		 return $string;
-		}
-	
 		function CommonDreamsExtractContent($url) {
 		$html3 = $this->file_get_html($url);
 		$text = $html3->find('div[class=field--type-text-with-summary]', 0)->innertext;
@@ -27,6 +19,14 @@ class CommonDreamsBridge extends BridgeAbstract{
 		return $text;
 		}
 
+        public function collectData(array $param){
+
+		function CommonDreamsUrl($string) {
+		 $html2 = explode(" ", $string);
+		 $string = $html2[2] . "/node/" . $html2[0];
+		 return $string;
+		}
+
 		$html = $this->file_get_html('http://www.commondreams.org/rss.xml') or $this->returnError('Could not request CommonDreams.', 404);
 		$limit = 0;
 		foreach($html->find('item') as $element) {
@@ -35,7 +35,7 @@ class CommonDreamsBridge extends BridgeAbstract{
 		 $item->title = $element->find('title', 0)->innertext;
 		 $item->uri = CommonDreamsUrl($element->find('guid', 0)->innertext);
 		 $item->timestamp = strtotime($element->find('pubDate', 0)->plaintext);
-		 $item->content = CommonDreamsExtractContent($item->uri);
+		 $item->content = $this->CommonDreamsExtractContent($item->uri);
 		 $this->items[] = $item;
 		 $limit++;
 		 }