PHP License
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Version 3 of PHP used a [[dual license]]—PHP 3's source is available under either the PHP License or the [[GNU General Public License]] (GPL). This practice was discontinued as of PHP 4, with PHP's developers citing the restrictions on reuse associated with the GPL's [[copyleft]] enforcement as being the reason for dropping it.{{ cite web | url = https://www.php.net/license/ | title = Why is PHP 4 not dual-licensed under the GNU General Public License (GPL) like PHP 3 was? | work = PHP: License Information FAQ | publisher = PHP.net }} The [[Zend Engine]], the core of the PHP interpreter, is separately licensed under the similar Zend Engine License,{{cite web | url = http://www.zend.com/license/2_00.txt | archive-url = https://web.archive.org/web/20130517195954/http://www.zend.com/license/2_00.txt | url-status = dead | archive-date = 2013-05-17 | title = Zend License 2.00 | work = Zend Engine: License Information }} which contains similar naming restrictions to the PHP license (applying to the names "Zend" and "Zend Engine"), and a clause requiring advertising materials to mention its use. |
Version 3 of PHP used a [[dual license]]—PHP 3's source is available under either the PHP License or the [[GNU General Public License]] (GPL). This practice was discontinued as of PHP 4, with PHP's developers citing the restrictions on reuse associated with the GPL's [[copyleft]] enforcement as being the reason for dropping it.{{ cite web | url = https://www.php.net/license/ | title = Why is PHP 4 not dual-licensed under the GNU General Public License (GPL) like PHP 3 was? | work = PHP: License Information FAQ | publisher = PHP.net }} The [[Zend Engine]], the core of the PHP interpreter, is separately licensed under the similar Zend Engine License,{{cite web | url = http://www.zend.com/license/2_00.txt | archive-url = https://web.archive.org/web/20130517195954/http://www.zend.com/license/2_00.txt | url-status = dead | archive-date = 2013-05-17 | title = Zend License 2.00 | work = Zend Engine: License Information }} which contains similar naming restrictions to the PHP license (applying to the names "Zend" and "Zend Engine"), and a clause requiring advertising materials to mention its use. |
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The PHP group |
The PHP group and zend are discontinuing the php license and zend license citing license proliferation, retirement and are moving to the 3 clause bsd license for better compatibility, starting with version 8.6 and have retroactively made php v4 backlicensed to modified bsd.{{Cite web |title=PHP: License Information |url=https://www.php.net/license/index.php |access-date=2026-04-26 |website=www.php.net |language=en}} |
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==Criticism== |
==Criticism== |
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