empty() is similar !$a

Posted on 01/27/2012 by samehramzylabib

The function empty() determines whether a variable is considered to be empty. The following things are considered to be empty:

It’s the same list as for the things that make $a evaluate to false in an expression.

if (empty($sp[0])) {
  form_destroy();
  die('Subject phrases missing 467778777. -Programmer.');
}

I think this could have been written more simply as:

if (!$sp[0]) {
  form_destroy();
  die('Subject phrases missing 467778777. -Programmer.');
}

If you disagree then please comment below.

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2 Responses to empty() is similar !$a

  1. samehramzylabib says:
    07/24/2012 at 1:11 PM

    Thanks for pointing that out:)

    Reply
  2. Sam Dufel says:
    07/24/2012 at 1:04 PM

    Sam,
    The difference between using empty($a[0]) and !$a[0] is that empty() will not generate a warning when $a[0] is not set. You won’t notice it with error reporting turned down, but if it’s set to E_WARNING or E_NOTICE it’ll start triggering errors.

    Reply

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