diff --git a/classes/context/Context.class.php b/classes/context/Context.class.php
index 7f04726cb..01e46b7db 100644
--- a/classes/context/Context.class.php
+++ b/classes/context/Context.class.php
@@ -200,8 +200,13 @@ class Context
 	 */
 	function init()
 	{
+		// fix missing HTTP_RAW_POST_DATA in PHP 5.6 and above
 		if(!isset($GLOBALS['HTTP_RAW_POST_DATA']) && version_compare(PHP_VERSION, '5.6.0', '>=') === true) {
 			$GLOBALS['HTTP_RAW_POST_DATA'] = file_get_contents("php://input");
+			if(!preg_match('/^[<\{\[]/', $GLOBALS['HTTP_RAW_POST_DATA']))
+			{
+				unset($GLOBALS['HTTP_RAW_POST_DATA']);
+			}
 		}
 
 		// set context variables in $GLOBALS (to use in display handler)