Merge branch 'SyslogTarget' of github.com:miramir/yii2 into miramir-SyslogTarget

framework/log/SyslogTarget.php

+<?php
+/**
+ * @link http://www.yiiframework.com/
+ * @license http://www.yiiframework.com/license/
+ */
+
+namespace yii\log;
+
+use Yii;
+
+/**
+ * SyslogTarget write log to syslog.
+ *
+ * @author miramir <gmiramir@gmail.com>
+ * @since 2.0
+ */
+class SyslogTarget extends Target
+{
+    /**
+     * @var string Syslog identity
+     */
+    public $identity;
+    /**
+     * @var integer syslog facility.
+     */
+    public $facility = LOG_SYSLOG;
+
+    /**
+     * @var array syslog levels
+     */
+    private $syslogLevels = [
+        Logger::LEVEL_TRACE => LOG_DEBUG,
+        Logger::LEVEL_PROFILE_BEGIN => LOG_DEBUG,
+        Logger::LEVEL_PROFILE_END => LOG_DEBUG,
+        Logger::LEVEL_INFO => LOG_INFO,
+        Logger::LEVEL_WARNING => LOG_WARNING,
+        Logger::LEVEL_ERROR => LOG_ERR,
+	];
+
+    /**
+     * Writes log messages to a syslog.
+     */
+    public function export()
+    {
+        openlog($this->identity, LOG_ODELAY | LOG_PID, $this->facility);
+        foreach($this->messages as $message){
+            syslog($this->syslogLevels[$message[1]], $this->formatMessage($message));
+        }
+        closelog();
+    }
+
+    /**
+     * @inheritdoc
+     */
+    public function formatMessage($message)
+    {
+        list($text, $level, $category, $timestamp) = $message;
+        $level = Logger::getLevelName($level);
+        if (!is_string($text)) {
+            $text = var_export($text, true);
+        }
+
+        $prefix = $this->prefix ? call_user_func($this->prefix, $message) : $this->getMessagePrefix($message);
+
+        return "{$prefix}[$level][$category] $text";
+    }
+
+}