diff --git a/library/log4php/LoggerLevel.php b/library/log4php/LoggerLevel.php
new file mode 100644
--- /dev/null
+++ b/library/log4php/LoggerLevel.php
@@ -0,0 +1,274 @@
+<?php
+/**
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements. See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License. You may obtain a copy of the License at
+ *
+ *       http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ * @package log4php
+ */
+
+/**
+ * Defines the minimum set of levels recognized by the system, that is
+ * <i>OFF</i>, <i>FATAL</i>, <i>ERROR</i>,
+ * <i>WARN</i>, <i>INFO</i>, <i>DEBUG</i> and
+ * <i>ALL</i>.
+ *
+ * <p>The <i>LoggerLevel</i> class may be subclassed to define a larger
+ * level set.</p>
+ *
+ * @version $Revision: 1379729 $
+ * @package log4php
+ * @since 0.5
+ */
+class LoggerLevel {
+
+    const OFF = 2147483647;
+    const FATAL = 50000;
+    const ERROR = 40000;
+    const WARN = 30000;
+    const INFO = 20000;
+    const DEBUG = 10000;
+    const TRACE = 5000;
+    const ALL = -2147483647;
+
+    /** Integer level value. */
+    private $level;
+
+    /** Contains a list of instantiated levels. */
+    private static $levelMap;
+
+    /** String representation of the level. */
+    private $levelStr;
+
+    /**
+     * Equivalent syslog level.
+     * @var integer
+     */
+    private $syslogEquivalent;
+
+    /**
+     * Constructor
+     *
+     * @param integer $level
+     * @param string $levelStr
+     * @param integer $syslogEquivalent
+     */
+    private function __construct($level, $levelStr, $syslogEquivalent) {
+        $this->level = $level;
+        $this->levelStr = $levelStr;
+        $this->syslogEquivalent = $syslogEquivalent;
+    }
+
+    /**
+     * Compares two logger levels.
+     *
+     * @param LoggerLevels $other
+     * @return boolean
+     */
+    public function equals($other) {
+        if ($other instanceof LoggerLevel) {
+            if ($this->level == $other->level) {
+                return true;
+            }
+        } else {
+            return false;
+        }
+    }
+
+    /**
+     * Returns an Off Level
+     * @return LoggerLevel
+     */
+    public static function getLevelOff() {
+        if (!isset(self::$levelMap[LoggerLevel::OFF])) {
+            self::$levelMap[LoggerLevel::OFF] = new LoggerLevel(LoggerLevel::OFF, 'OFF', LOG_ALERT);
+        }
+        return self::$levelMap[LoggerLevel::OFF];
+    }
+
+    /**
+     * Returns a Fatal Level
+     * @return LoggerLevel
+     */
+    public static function getLevelFatal() {
+        if (!isset(self::$levelMap[LoggerLevel::FATAL])) {
+            self::$levelMap[LoggerLevel::FATAL] = new LoggerLevel(LoggerLevel::FATAL, 'FATAL', LOG_ALERT);
+        }
+        return self::$levelMap[LoggerLevel::FATAL];
+    }
+
+    /**
+     * Returns an Error Level
+     * @return LoggerLevel
+     */
+    public static function getLevelError() {
+        if (!isset(self::$levelMap[LoggerLevel::ERROR])) {
+            self::$levelMap[LoggerLevel::ERROR] = new LoggerLevel(LoggerLevel::ERROR, 'ERROR', LOG_ERR);
+        }
+        return self::$levelMap[LoggerLevel::ERROR];
+    }
+
+    /**
+     * Returns a Warn Level
+     * @return LoggerLevel
+     */
+    public static function getLevelWarn() {
+        if (!isset(self::$levelMap[LoggerLevel::WARN])) {
+            self::$levelMap[LoggerLevel::WARN] = new LoggerLevel(LoggerLevel::WARN, 'WARN', LOG_WARNING);
+        }
+        return self::$levelMap[LoggerLevel::WARN];
+    }
+
+    /**
+     * Returns an Info Level
+     * @return LoggerLevel
+     */
+    public static function getLevelInfo() {
+        if (!isset(self::$levelMap[LoggerLevel::INFO])) {
+            self::$levelMap[LoggerLevel::INFO] = new LoggerLevel(LoggerLevel::INFO, 'INFO', LOG_INFO);
+        }
+        return self::$levelMap[LoggerLevel::INFO];
+    }
+
+    /**
+     * Returns a Debug Level
+     * @return LoggerLevel
+     */
+    public static function getLevelDebug() {
+        if (!isset(self::$levelMap[LoggerLevel::DEBUG])) {
+            self::$levelMap[LoggerLevel::DEBUG] = new LoggerLevel(LoggerLevel::DEBUG, 'DEBUG', LOG_DEBUG);
+        }
+        return self::$levelMap[LoggerLevel::DEBUG];
+    }
+
+    /**
+     * Returns a Trace Level
+     * @return LoggerLevel
+     */
+    public static function getLevelTrace() {
+        if (!isset(self::$levelMap[LoggerLevel::TRACE])) {
+            self::$levelMap[LoggerLevel::TRACE] = new LoggerLevel(LoggerLevel::TRACE, 'TRACE', LOG_DEBUG);
+        }
+        return self::$levelMap[LoggerLevel::TRACE];
+    }
+
+    /**
+     * Returns an All Level
+     * @return LoggerLevel
+     */
+    public static function getLevelAll() {
+        if (!isset(self::$levelMap[LoggerLevel::ALL])) {
+            self::$levelMap[LoggerLevel::ALL] = new LoggerLevel(LoggerLevel::ALL, 'ALL', LOG_DEBUG);
+        }
+        return self::$levelMap[LoggerLevel::ALL];
+    }
+
+    /**
+     * Return the syslog equivalent of this level as an integer.
+     * @return integer
+     */
+    public function getSyslogEquivalent() {
+        return $this->syslogEquivalent;
+    }
+
+    /**
+     * Returns <i>true</i> if this level has a higher or equal
+     * level than the level passed as argument, <i>false</i>
+     * otherwise.
+     *
+     * @param LoggerLevel $other
+     * @return boolean
+     */
+    public function isGreaterOrEqual($other) {
+        return $this->level >= $other->level;
+    }
+
+    /**
+     * Returns the string representation of this level.
+     * @return string
+     */
+    public function toString() {
+        return $this->levelStr;
+    }
+
+    /**
+     * Returns the string representation of this level.
+     * @return string
+     */
+    public function __toString() {
+        return $this->toString();
+    }
+
+    /**
+     * Returns the integer representation of this level.
+     * @return integer
+     */
+    public function toInt() {
+        return $this->level;
+    }
+
+    /**
+     * Convert the input argument to a level. If the conversion fails, then
+     * this method returns the provided default level.
+     *
+     * @param mixed $arg The value to convert to level.
+     * @param LoggerLevel $default Value to return if conversion is not possible.
+     * @return LoggerLevel
+     */
+    public static function toLevel($arg, $defaultLevel = null) {
+        if (is_int($arg)) {
+            switch ($arg) {
+                case self::ALL:
+                    return self::getLevelAll();
+                case self::TRACE:
+                    return self::getLevelTrace();
+                case self::DEBUG:
+                    return self::getLevelDebug();
+                case self::INFO:
+                    return self::getLevelInfo();
+                case self::WARN:
+                    return self::getLevelWarn();
+                case self::ERROR:
+                    return self::getLevelError();
+                case self::FATAL:
+                    return self::getLevelFatal();
+                case self::OFF:
+                    return self::getLevelOff();
+                default:
+                    return $defaultLevel;
+            }
+        } else {
+            switch (strtoupper($arg)) {
+                case 'ALL':
+                    return self::getLevelAll();
+                case 'TRACE':
+                    return self::getLevelTrace();
+                case 'DEBUG':
+                    return self::getLevelDebug();
+                case 'INFO':
+                    return self::getLevelInfo();
+                case 'WARN':
+                    return self::getLevelWarn();
+                case 'ERROR':
+                    return self::getLevelError();
+                case 'FATAL':
+                    return self::getLevelFatal();
+                case 'OFF':
+                    return self::getLevelOff();
+                default:
+                    return $defaultLevel;
+            }
+        }
+    }
+}