Editing PHP (section)

== Licensing ==
{{Main|PHP License}}

PHP is [[free software]] released under the [[PHP License]], which stipulates that:<ref>{{cite web|url=https://www.php.net/license/3_01.txt |title=The PHP License, version 3.01|access-date=2010-05-20}}</ref>

{{blockquote
| 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".
}}

This restriction on the use of "PHP" makes the PHP License incompatible with the [[GNU General Public License]] (GPL), while the Zend License is incompatible due to an advertising clause similar to that of the original [[BSD license]].<ref>{{cite web | title = GPL-Incompatible, Free Software Licenses | url = https://www.gnu.org/licenses/license-list.html#GPLIncompatibleLicenses | work = Various Licenses and Comments about Them | publisher = Free Software Foundation|access-date=2011-01-03}}</ref>