Upgrade/Install: Prevent plugin auto updates if PHP version requirements are not satisfied.

In [44937] and [44939], changes were made to prevent a user from updating any plugin that requires a higher version of PHP than the site is running. This compliments those changes to also prevent plugins from being auto updated when the same requirements are not met.

Props: TimothyBlynJacobs, davidbaumwald.
Fixes #46613.

git-svn-id: https://develop.svn.wordpress.org/trunk@45165 602fd350-edb4-49c9-b593-d223f7449a82

src/wp-admin/includes/class-wp-automatic-updater.php

@@ -205,6 +205,13 @@ class WP_Automatic_Updater {
 			}
 		}
 
+		// If updating a plugin, ensure the minimum PHP version requirements are satisfied.
+		if ( 'plugin' === $type ) {
+			if ( ! empty( $item->requires_php ) && version_compare( phpversion(), $item->requires_php, '<' ) ) {
+				return false;
+			}
+		}
+
 		return true;
 	}