Redistribution and use in source and binary forms, with or without
modification, is permitted provided that the following conditions are
met:

1. Redistributions of source code must retain the above copyright
   notice, this list of conditions and the following disclaimer.

2. 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.

3. The name "PHP" must not be used to endorse or promote products
   derived from this software without prior written permission. For
   written permission, please contact group@php.net.

4. Products derived from this software may not be called "PHP", nor
   may "PHP" appear in their name, without prior written permission
   from group@php.net.  You may indicate that your software works in
   conjunction with PHP by saying "Foo for PHP" instead of calling it
   "PHP Foo" or "phpfoo"

5. The PHP Group may publish revised and/or new versions of the
   license from time to time. Each version will be given a
   distinguishing version number.  Once covered code has been
   published under a particular version of the license, you may
   always continue to use it under the terms of that version. You may
   also choose to use such covered code under the terms of any
   subsequent version of the license published by the PHP Group. No
   one other than the PHP Group has the right to modify the terms
   applicable to covered code created under this License.

6. Redistributions of any form whatsoever must retain the following
   acknowledgment: "This product includes PHP software, freely
   available from <https://secure.php.net/software.php/>".

THIS SOFTWARE IS PROVIDED BY THE PHP DEVELOPMENT TEAM ``AS IS'' AND
ANY EXPRESSED 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 PHP
DEVELOPMENT TEAM OR ITS 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.

This software consists of voluntary contributions made by many
individuals on behalf of the PHP Group.

The PHP Group can be contacted via Email at group@php.net.

For more information on the PHP Group and the PHP project,
please see <https://secure.php.net>.

PHP includes the Zend Engine, freely available at
<https://www.zend.com>.