The function split() is deprecated and will be removed in php 7. Replaced split() with explode() to ensure smooth transition to php 7.
For more information, see http://php.net/manual/en/function.split.php
diff --git a/src/examples/php/appender_socket_server.php b/src/examples/php/appender_socket_server.php
index ed68225..5750bd0 100644
--- a/src/examples/php/appender_socket_server.php
+++ b/src/examples/php/appender_socket_server.php
@@ -54,7 +54,7 @@
                     throw new Exception("Please use 'log4php.appender.default.useXml = false' in appender_socket.properties file!");
                 }
                 preg_match('/^(O:\d+)/', $data, $parts);
-                $events = split($parts[1], $data);
+                $events = explode($parts[1], $data);
                 array_shift($events);
                 $size = count($events);
                 for($i=0; $i<$size; $i++) {