From 353532755d65f0af18dcae3cdcdcf194c974b408 Mon Sep 17 00:00:00 2001
From: Synchro <marcus@synchromedia.co.uk>
Date: Thu, 6 Nov 2014 13:34:36 +0100
Subject: [PATCH] Avoid Debugoutput clash with built-in function names, fixes
 #308

---
 class.smtp.php | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/class.smtp.php b/class.smtp.php
index 2c5b8d300..2e6003131 100644
--- a/class.smtp.php
+++ b/class.smtp.php
@@ -188,7 +188,8 @@ protected function edebug($str, $level = 0)
         if ($level > $this->do_debug) {
             return;
         }
-        if (is_callable($this->Debugoutput)) {
+        //Avoid clash with built-in function names
+        if (!in_array($this->Debugoutput, array('error_log', 'html', 'echo')) and is_callable($this->Debugoutput)) {
             call_user_func($this->Debugoutput, $str, $this->do_debug);
             return;
         }