Date/Time: Replace all instances of date() with gmdate().

Use of `date()` in core depends on PHP timezone set to UTC and not changed by third party code (which cannot be guaranteed).

`gmdate()` is functionally equivalent, but is not affected by PHP timezone setting: it's always UTC, which is the exact behavior the core needs.

Props nielsdeblaauw, Rarst.
Fixes #46438. See #44491.

git-svn-id: https://develop.svn.wordpress.org/trunk@45424 602fd350-edb4-49c9-b593-d223f7449a82

src/wp-admin/includes/class-ftp.php

@@ -207,7 +207,7 @@ class ftp_base {
 				$b['month'] = $lucifer[5];
 				$b['day'] = $lucifer[6];
 				if (preg_match("/([0-9]{2}):([0-9]{2})/",$lucifer[7],$l2)) {
-					$b['year'] = date("Y");
+					$b['year'] = gmdate("Y");
 					$b['hour'] = $l2[1];
 					$b['minute'] = $l2[2];
 				} else {