Merge pull request #17734 from MauricioFauth/hide-deprecation-errors

Hide deprecation notices

libraries/classes/ErrorHandler.php

@@ -275,8 +275,11 @@ class ErrorHandler
         $error = new Error($errno, $errstr, $errfile, $errline);
         $error->setHideLocation($this->hideLocation);
 
-        // do not repeat errors
-        $this->errors[$error->getHash()] = $error;
+        // Deprecation errors will be shown in development environment, as they will have a different number.
+        if ($error->getNumber() !== E_DEPRECATED) {
+            // do not repeat errors
+            $this->errors[$error->getHash()] = $error;
+        }
 
         switch ($error->getNumber()) {
             case E_STRICT: