SpeedPHP是遵循BSD许可证发布的开源软件，许可证条款如下：

* Copyright (c) 2010, SpeedPHP.com
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
*     * Redistributions of source code must retain the above copyright
*       notice, this list of conditions and the following disclaimer.
*     * Redistributions in binary form must reproduce the above copyright
*       notice, this list of conditions and the following disclaimer in the
*       documentation and/or other materials provided with the distribution.
*     * Neither the name of the SpeedPHP.com nor the
*       names of its contributors may be used to endorse or promote products
*       derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE SpeedPHP.com AND CONTRIBUTORS "AS IS" AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE SpeedPHP.com AND CONTRIBUTORS BE LIABLE FOR ANY
* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

* 著作权由SpeedPHP.com所有。
* 这份授权条款，在使用者符合以下三条件的情形下，授予使用者使用及再散播本
* 软件包装原始码及二进位可执行形式的权利，无论此包装是否经改作皆然：
* 
* * 对于本软件源代码的再散播，必须保留上述的版权宣告、此三条件表列，以
*   及下述的免责声明。
* * 对于本套件二进位可执行形式的再散播，必须连带以文件以及／或者其他附
*   于散播包装中的媒介方式，重制上述之版权宣告、此三条件表列，以及下述
*   的免责声明。
* * 未获事前取得书面许可，不得使用SpeedPHP.com或本软件贡献者之名称，
*   来为本软件之衍生物做任何表示支持、认可或推广、促销之行为。
* 
* 免责声明：本软件是由SpeedPHP.com及本软件之贡献者以现状（"as is"）提供，
* 本软件包装不负任何明示或默示之担保责任，包括但不限于就适售性以及特定目
* 的的适用性为默示性担保。SpeedPHP.com及本软件之贡献者，无论任何条件、
* 无论成因或任何责任主义、无论此责任为因合约关系、无过失责任主义或因非违
* 约之侵权（包括过失或其他原因等）而起，对于任何因使用本软件包装所产生的
* 任何直接性、间接性、偶发性、特殊性、惩罚性或任何结果的损害（包括但不限
* 于替代商品或劳务之购用、使用损失、资料损失、利益损失、业务中断等等），
* 不负任何责任，即在该种使用已获事前告知可能会造成此类损害的情形下亦然。

BSD许可证参考 http://www.opensource.org/licenses/bsd-license.php
维基中文对BSD许可证的解释：http://zh.wikipedia.org/wiki/BSD许可证