I'm currently working through a large number of warnings I have logged after my server was updated to PHP 8.

One particular point that has me scratching my head is the following code block

if (!$option['type'] || $option['type'] == "select") {
  $output .= '<b>'.$option['title'].':</b>';
}

I know that I can use isset($option['type']) like this

isset($option['type']) && $option['type'] == "select"

but confused how that would work for

!$option['type']

How can you be checking if isset, but also it being NOT. If it's NOT, then surely it isn't set anyway?

CodePudding user response：

The test for "may not exist or may be falsey" is:

if (empty($option['type']))