diff --git a/reference/errorfunc/functions/set-error-handler.xml b/reference/errorfunc/functions/set-error-handler.xml
index abdd575118..ffe81f9cf0 100644
--- a/reference/errorfunc/functions/set-error-handler.xml
+++ b/reference/errorfunc/functions/set-error-handler.xml
@@ -230,6 +230,9 @@ function myErrorHandler($errno, $errstr, $errfile, $errline)
         return false;
     }
 
+    // $errstr may need to be escaped:
+    $errstr = htmlspecialchars($errstr);
+
     switch ($errno) {
     case E_USER_ERROR:
         echo "<b>My ERROR</b> [$errno] $errstr<br />\n";
@@ -237,7 +240,6 @@ function myErrorHandler($errno, $errstr, $errfile, $errline)
         echo ", PHP " . PHP_VERSION . " (" . PHP_OS . ")<br />\n";
         echo "Aborting...<br />\n";
         exit(1);
-        break;
 
     case E_USER_WARNING:
         echo "<b>My WARNING</b> [$errno] $errstr<br />\n";