Added SyslogUdpHandler.

This handler lets you log to a remote syslogd server via UPD. The
use-case here is having many webservers, and the need to gather log-
files on a centralized server.

src/Monolog/Handler/SyslogUdp/UdpSocket.php

@@ -0,0 +1,62 @@
+<?php
+
+/*
+ * This file is part of the Monolog package.
+ *
+ * (c) Jordi Boggiano <j.boggiano@seld.be>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Monolog\Handler\SyslogUdp;
+
+class UdpSocket
+{
+    const DATAGRAM_MAX_LENGTH = 2048;
+
+    public function __construct($ip, $port)
+    {
+        $this->ip = $ip;
+        $this->port = $port;
+        $this->socket = socket_create(AF_INET, SOCK_DGRAM, SOL_UDP);
+    }
+
+    public function write($line, $header = "")
+    {
+        $remaining = $line;
+        while (!is_null($remaining)) {
+            list($chunk, $remaining) = $this->splitLineIfNessesary($remaining, $header);
+            $this->send($chunk);
+        }
+    }
+
+    public function close()
+    {
+        socket_close($this->socket);
+    }
+
+    protected function send($chunk)
+    {
+        socket_sendto($this->socket, $chunk, strlen($chunk), $flags = 0, $this->ip, $this->port);
+    }
+
+    protected function splitLineIfNessesary($line, $header)
+    {
+        if ($this->shouldSplitLine($line, $header)) {
+            $chunkSize = self::DATAGRAM_MAX_LENGTH - strlen($header);
+            $chunk = $header . substr($line, 0, $chunkSize);
+            $remaining = substr($line, $chunkSize);
+        } else {
+            $chunk = $header . $line;
+            $remaining = null;
+        }
+
+        return [$chunk, $remaining];
+    }
+
+    protected function shouldSplitLine($remaining, $header)
+    {
+        return strlen($header.$remaining) > self::DATAGRAM_MAX_LENGTH;
+    }
+}