T176370: Migrate to PHP 7 in WMF production

Phabricator Link	T176370
Status	resolved
Priority	Medium (orange)
Points
Phabricator Task Created	2017/09/20 06:19 PM
Wiki Page Created	2019/06/09 01:20 PM
Phabricator Task Last Modified	2020/10/16 01:42 PM
Wiki Page Last Updated	2021/01/06 12:13 PM
Phabricator Task Closed	2019/11/23 09:11 AM
Authored By	tstarling (Tim Starling)
Assigned To
Projects	HHVM (Deprecation) MW-1.34-notes (1.34.0-wmf.22; 2019-09-10) Patch-For-Review Platform Team Initiatives (PHP7 (TEC4)) SRE (Acknowledged) TechCom-RFC (TechCom-RFC-Closed) (Implemented) User-ArielGlenn (Watching now)
Platform Engineering Initiative Column	PHP7 (TEC4)
Platform Team Workboards Column
Subtasks	T209981: Confirm that post-send functions work fine with mediawiki under PHP 7 (resolved) T216664: MWException when viewing or comparing certain pages with Preprocessor_DOM (PHP7 beta feature) (resolved) T187147: Port mediawiki/php/wmerrors to PHP7 and deploy (resolved) T176916: Set up sampling profiler for PHP 7 (alternative to HHVM Xenon) (resolved) T215350: Wikimedia PHP log entries should include the version of PHP used (resolved) T215126: PHP warning on some Echo email sending attempts due to mismatching PEAR file versions (resolved) T211488: Audit and sync INI settings as needed between HHVM and PHP 7 (resolved) T221347: PHP7 opcache sometimes corrupts when cleared (was: Fatal ConfigException, undefined InitialiseSettings variable) (resolved) T218005: Variable from InitialiseSettings can be undefined (corrupt opcache?) (duplicate) T215746: Checkup on cssjanus PHP 7 compat (resolved) T211906: Expose PHP7/HHVM to NavTiming in a header, send with navtiming beacon so we can use it as a dimension (resolved) T216712: Switch PHP 7.2 packages to an internal component (resolved) T215376: mwscript dies on mwmaint with PHP=php7.2 due to php-redis missing (resolved) T211964: Make scap and opcache work consistently together (resolved) T211184: Correctly collect logs from php-fpm pools (resolved) T210717: Find an alternative to HHVM curl connection pooling for PHP 7 (resolved) T206152: Set up request debug profiling for PHP 7 (resolved) T201140: Puppetize the installation of PHP-FPM on the MediaWiki hosts (resolved) T196968: Re-organize the apache configuration for MediaWiki in puppet (resolved) T196125: php-memcached 3.0 (PHP 7) incompatible with BagOStuff (resolved) T195392: Switch cronjobs on maintenance hosts to PHP7 (resolved) T184854: hhvm memcached and php7 memcached extensions do not play well together (resolved) T174431: Upgrade mw* servers to Debian Stretch (using HHVM) (resolved) T144962: Run MediaWiki tests on PHP 7 (resolved) T224857: Enhance MediaWiki deployments for support of php7.x (resolved) T219150: Ramp up percentage of users on php7.2 to 100% on both API and appserver clusters (resolved) T234283: Messages in Logstash from php-fatal-error.php are missing from type:mediawiki/channel:fatal (resolved) T240509: PHP7 exif_read_data doesn't read all the EXIF key/values that HHVM version did (open)
Parent Tasks

Column Transitions: (Added project: ⇑, Removed project: ⇓,Entered column: ⇒, Exited column: ⇐)

Project	Column	Date
HHVM	⇐ Backlog	20 September 2017
HHVM	⇒ Deprecation	20 September 2017
TechCom-RFC	⇐ P1: Define	11 October 2017
TechCom-RFC	⇒ In progress	11 October 2017
MediaWiki-Platform-Team	⇐ Inbox	13 October 2017
MediaWiki-Platform-Team	⇒ Inbox	13 October 2017
[DO NOT USE] NewPHP	⇐ Unsorted	17 October 2017
[DO NOT USE] NewPHP	⇒ PHP 7	17 October 2017
TechCom-RFC	⇐ In progress	13 December 2017
TechCom-RFC	⇒ P5: Last Call	13 December 2017
MediaWiki-Platform-Team	⇐ Inbox	2 January 2018
MediaWiki-Platform-Team	⇒ Inbox	2 January 2018
MediaWiki-Platform-Team	⇐ Inbox	2 January 2018
MediaWiki-Platform-Team	⇒ Watching	2 January 2018
MediaWiki-Platform-Team	⇐ Watching	2 January 2018
MediaWiki-Platform-Team	⇒ Watching	2 January 2018
MediaWiki-Platform-Team	⇐ Watching	2 January 2018
MediaWiki-Platform-Team	⇒ Watching	2 January 2018
MediaWiki-Platform-Team	⇐ Watching	9 January 2018
MediaWiki-Platform-Team	⇒ Watching	9 January 2018
TechCom-RFC	⇐ P5: Last Call	10 January 2018
TechCom-RFC	⇒ TechCom-RFC-Closed	10 January 2018
TechCom-RFC	⇐ TechCom-RFC-Closed	10 January 2018
TechCom-RFC	⇒ TechCom-RFC-Closed	10 January 2018
TechCom-RFC (TechCom-RFC-Closed)	⇐ Untriaged	10 January 2018
TechCom-RFC (TechCom-RFC-Closed)	⇒ In progress	10 January 2018
⇓ [DO NOT USE] NewPHP		27 February 2018
⇑ PHP 7.0 support		27 February 2018
PHP 7.0 support	⇐ Backlog	27 February 2018
PHP 7.0 support	⇒ Wikimedia production	27 February 2018
⇓ PHP 7.0 support		18 April 2018
⇓ MediaWiki-Platform-Team		11 July 2018
⇑ Core-Platform-Team-Old		11 July 2018
Core-Platform-Team-Old	⇐ Inbox	11 July 2018
Core-Platform-Team-Old	⇒ Watching	11 July 2018
User-ArielGlenn	⇐ Short-term backlog	7 August 2018
User-ArielGlenn	⇒ Watching now	7 August 2018
⇓ Core-Platform-Team-Old		1 October 2018
⇑ Platform Team Legacy (Watching / External)		1 October 2018
⇑ Patch-For-Review		3 October 2018
⇓ Platform Team Legacy (Watching / External)		10 December 2018
⇑ Platform Team Workboards (Doing)		10 December 2018
⇑ Platform Engineering (PHP7 (TEC4))		10 December 2018
SRE	⇐ Backlog	26 January 2019
SRE	⇒ Acknowledged	26 January 2019
⇓ Platform Team Workboards (Doing)		5 July 2019
⇑ Platform Team Workboards (Team 1)		5 July 2019
Platform Team Workboards (Team 1)	⇐ Backlog	5 July 2019
Platform Team Workboards (Team 1)	⇒ Doing	5 July 2019
⇓ Platform Team Workboards (Team 1)		16 July 2019
⇓ Platform Engineering (PHP7 (TEC4))		26 July 2019
Platform Engineering	⇐ PHP7 (TEC4)	26 July 2019
Platform Engineering	⇒ mop	26 July 2019
⇑ Platform Team Initiatives (PHP7 (TEC4))		26 July 2019
Platform Team Initiatives	⇐ PHP7 (TEC4)	29 July 2019
Platform Team Initiatives	⇒ PHP7 (TEC4)	29 July 2019
⇑ MW-1.34-notes (1.34.0-wmf.22; 2019-09-10)		5 September 2019
TechCom-RFC (TechCom-RFC-Closed)	⇐ In progress	16 October 2019
TechCom-RFC (TechCom-RFC-Closed)	⇒ Implemented	16 October 2019
TechCom-RFC (TechCom-RFC-Closed)	⇐ Implemented	3 August 2020
TechCom-RFC (TechCom-RFC-Closed)	⇒ Implemented	3 August 2020