T271736: Migrate WMF Production from PHP 7.2 to PHP 7.4

Phabricator Link	T271736
Status	open
Priority	Needs Triage (violet)
Points
Phabricator Task Created	2021/01/11 01:01 PM
Wiki Page Created	2021/04/22 06:46 PM
Phabricator Task Last Modified	2022/01/10 04:43 PM
Wiki Page Last Updated	2022/01/10 06:19 PM
Phabricator Task Closed
Authored By	Reedy (Sam Reed)
Assigned To
Projects	Performance-Team (Radar) (Watching) serviceops (Incoming 🐫)
Platform Engineering Initiative Column
Platform Team Workboards Column
Subtasks	T245757: Upgrade MediaWiki clusters to Debian Buster (debian 10) (resolved) T263437: Allow easier ICU transitions in MediaWiki (change how sortkey collation is managed in the categorylinks table) (open) T291127: MediaWiki session management does not work on split PHP 7.4 and < PHP 7.4 cluster (resolved) T292552: Rename articles and users to prepare for PHP 7.3 unicode changes (open) T293451: Allow sending traffic to php 7.2 or 7.4 selectively in the apache configuration for MediaWiki (open) T293450: Allow coexisting php version in our puppet code (resolved) T293449: Package php 7.4 for wikimedia production (resolved) T293851: Re-build all CI images of PHP 7.4 from sury's package to Wikimedia's one, to assure us that it will work (open) T293924: Also run PHP 7.4 jobs on wmf branch patches (open) T293996: Build MediaWiki images for kubernetes based on php 7.4 (resolved)
Parent Tasks	T261872: Drop PHP 7.2 support from MediaWiki master branch, once Wikimedia production is on 7.4

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