The `php_uname()` function can be disabled on some hosts, in which case the call fails. The `PHP_OS_FAMILY` constant indicates the operating system family PHP was built for, and is available as of PHP 7.2.0. Reference: [https://www.php.net/manual/en/reserved.constants.php#constant.php-os-family PHP Manual: Predefined Constants: PHP_OS_FAMILY]. Follow-up to [6779], [57985], [58678], [58684]. Props daymobrew, costdev, desrosj. Fixes #57711. Built from https://develop.svn.wordpress.org/trunk@59506 git-svn-id: http://core.svn.wordpress.org/trunk@58892 1a063a9b-81f0-0310-95a4-ce76da25c4cd
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192 KiB