The path to magic quote sanity took a fun and exciting turn: PHP core removed it and WordPress updated the minimum version.
For the formally external pclzip, the code is commented out to make investigating easier and in case we ever need to merge upstream (if that still exists) changes.
Props ayeshrajans, jrf, jorbin.
See #47783.
Fixes#18322.
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PHP7 is deprecating PHP4 style constructors, so we need to modify our code to have _construct methods that fire before the named PHP4 style constructors. The PHP4 style constructors will call the PHP5 style constructor in case it is being called directly (usually via parent::METHOD).
This modifies external libraries to add PHP5 style constructors, but doesn't add a notice for when they are used. In WordPress core code, PHP4 style constructors are being given a call to _deprecated_constructor. To the PHP4 style constructor I say "I know that I can't take no more | It ain't no lie | I wanna see you out that door | Baby, bye, bye, bye..."
Upstream: https://wiki.php.net/rfc/remove_php4_constructors
Props jdgrimes, netweb, jorbin
See #31982
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