rfc:deprecate_php_short_tags
This is an old revision of the document!
PHP RFC: Deprecate PHP Short open tags
- Version: 0.1
- Date: 2019-03-20
- Author: George Peter Banyard, girgias@php.net
- Status: Under Discussion
- Target Version: PHP 7.4
- Implementation: https://github.com/php/php-src/pull/3972
- First Published at: http://wiki.php.net/rfc/deprecate_php_short_tags
Introduction
PHP has provided over the years different ways to indicate the beginning of PHP code other than the standard <?php ... ?> open tags. Most of these opening tags have been removed with PHP 7.0.01), however, PHP's short open tags still remain.
Proposal
Deprecate and disable short_open_tag in PHP 7.4 and remove PHP's short open tags in PHP 8.0.
Reasoning
- The PHP documentation discourages their usage.
- PHP's short open tags clash with XML
<?xml ?>and can mean two different things depending on the INI configuration. - PHP's short open tags depend on an INI directive and as such are non-portable.
- As such source code may leak if PHP relying on the short open tags is executed on a configuration where this isn't enabled.
- PHP's parser simplification.
Backward Incompatible Changes
Every script which currently uses the discouraged short <? open tag will need to convert to the standard <?php open tag.
This can be automatically achieved by using the “full_opening_tag” fixer from PHP-CS-Fixer.
Proposed PHP Version(s)
Deprecation notice and default value changed to Off in PHP 7.4 and removal in PHP 8.0.
RFC Impact
To SAPIs
None.
To Existing Extensions
Readline and Tokenizer have been updated in the implementations patches.
To Opcache
None to my understanding.
php.ini Defaults
Change short_open_tag from “1” to “0”.
Unaffected PHP Functionality
The <?= short tag is unaffected because as of PHP 5.4 it is always available.
Feedback
Facebook poll 2) created by Peter Kokot: 73 for, 2 against.
Proposed Voting Choices
Yes/No for boths votes.
Vote
Primary vote: Deprecate PHP's short open tags in PHP 7.4.
Requires a 2/3 majority.
Secondary vote: Remove PHP's short open tags in PHP 8.0.
Requires a 2/3 majority.
Patches and Tests
https://github.com/php/php-src/pull/3972 PHP 7.4 Deprecation Notice Implementation
https://github.com/php/php-src/pull/3975 PHP 8.0 Removal Implementation
TBD Documentation patch
Implementation
After the project is implemented, this section should contain
- the version(s) it was merged into
- a link to the git commit(s)
- a link to the PHP manual entry for the feature
- a link to the language specification section (if any)
References
Initial feedback on Internals (link to External.io)
RFC Announcement on Internals (link to External.io)
1)
Remove alternative PHP tags RFC https://wiki.php.net/rfc/remove_alternative_php_tags
rfc/deprecate_php_short_tags.1554798975.txt.gz · Last modified: 2019/04/09 08:36 by girgias