php - How to fix this "undefined index" if statement -

this question has answer here:

my code below

$base = if((!empty(($_server['https']  ? 'https' : 'http') . '://' . $_server['http_host'] . '/'));

i'm checking whether $_server['https'] not empty notice:

notice: undefined index: https in d:\xampp\htdocs\flower-shop\flowers.php on line 24

the following code should work. if notice, in php shorthand don't include if word.

<?php    $base = (isset($_server['https']) ? 'https' : 'http').'://'.$_server['http_host'].'/'; ?>

i not rely on $_server['http_host'] since can modified client , can cause huge issues.

Unity