new file mode 100644
--- /dev/null
+++ b/library/log4php/LoggerLocationInfo.php
@@ -0,0 +1,103 @@
+<?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
+ */
+
+/**
+ * The internal representation of caller location information.
+ *
+ * @version $Revision: 1379738 $
+ * @package log4php
+ * @since 0.3
+ */
+class LoggerLocationInfo {
+
+    /** The value to return when the location information is not available. */
+    const LOCATION_INFO_NA = 'NA';
+
+    /**
+     * Caller line number.
+     * @var integer
+     */
+    protected $lineNumber;
+
+    /**
+     * Caller file name.
+     * @var string
+     */
+    protected $fileName;
+
+    /**
+     * Caller class name.
+     * @var string
+     */
+    protected $className;
+
+    /**
+     * Caller method name.
+     * @var string
+     */
+    protected $methodName;
+
+    /**
+     * All the information combined.
+     * @var string
+     */
+    protected $fullInfo;
+
+    /**
+     * Instantiate location information based on a {@link PHP_MANUAL#debug_backtrace}.
+     *
+     * @param array $trace
+     * @param mixed $caller
+     */
+    public function __construct($trace, $fqcn = null) {
+        $this->lineNumber = isset($trace['line']) ? $trace['line'] : null;
+        $this->fileName = isset($trace['file']) ? $trace['file'] : null;
+        $this->className = isset($trace['class']) ? $trace['class'] : null;
+        $this->methodName = isset($trace['function']) ? $trace['function'] : null;
+        $this->fullInfo = $this->getClassName() . '.' . $this->getMethodName() .
+            '(' . $this->getFileName() . ':' . $this->getLineNumber() . ')';
+    }
+
+    /** Returns the caller class name. */
+    public function getClassName() {
+        return ($this->className === null) ? self::LOCATION_INFO_NA : $this->className;
+    }
+
+    /** Returns the caller file name. */
+    public function getFileName() {
+        return ($this->fileName === null) ? self::LOCATION_INFO_NA : $this->fileName;
+    }
+
+    /** Returns the caller line number. */
+    public function getLineNumber() {
+        return ($this->lineNumber === null) ? self::LOCATION_INFO_NA : $this->lineNumber;
+    }
+
+    /** Returns the caller method name. */
+    public function getMethodName() {
+        return ($this->methodName === null) ? self::LOCATION_INFO_NA : $this->methodName;
+    }
+
+    /** Returns the full information of the caller. */
+    public function getFullInfo() {
+        return ($this->fullInfo === null) ? self::LOCATION_INFO_NA : $this->fullInfo;
+    }
+
+}