Add JSON polyfill

json_encode and json_decode functions for use in PHP 5.1

qa-include/qa-base.php

@@ -1602,6 +1602,26 @@
 	}
 
 
+	/**
+	 * JSON compatibility layer for PHP 5.1
+	 */
+	if (!function_exists('json_encode') && !function_exists('json_decode')) {
+		require_once QA_INCLUDE_DIR.'vendor/JSON.php';
+
+		function json_encode($json)
+		{
+			$service = new Services_JSON(SERVICES_JSON_LOOSE_TYPE);
+			return $service->encode($json);
+		}
+
+		function json_decode($json)
+		{
+			$service = new Services_JSON(SERVICES_JSON_LOOSE_TYPE);
+			return $service->decode($json);
+		}
+	}
+
+
 /*
 	Omit PHP closing tag to help avoid accidental output
 */

qa-plugin/facebook-login/qa-facebook-login-page.php

@@ -46,16 +46,6 @@
 					$tourl=qa_path_absolute('');
 
 				if (strlen($app_id) && strlen($app_secret)) {
-					if (!function_exists('json_decode')) { // work around fact that PHP might not have JSON extension installed
-						require_once $this->directory.'JSON.php';
-
-						function json_decode($json)
-						{
-							$decoder=new Services_JSON(SERVICES_JSON_LOOSE_TYPE);
-							return $decoder->decode($json);
-						}
-					}
-
 					require_once $this->directory.'facebook.php';
 
 					$facebook = new Facebook(array(