Syntax help with sessions comparison

[Tailslide]

Hello all - first query of the week!

What would be the syntax for comparing data against two different session variables? I can't seem to get it quite right.

What I want it to do is check there's a logged in session and check whether the email session is blank if so echo something:

If (isset($_SESSION['loggedIn'])) && ($_SESSION['email']) != '')
  {
   echo 'blah';
  } 

The first comparison is fine but can't get the second bit right.
Ta!

[AnthonySterling]

Morning.

<?php
if((isset($_SESSION['loggedIn']) === true) && (empty($_SESSION['email']) === false))
{
    // do stuff
}
?>

See empty().

[adam.jimenez]

u were on the right track

If (isset($_SESSION['loggedIn'])) && ($_SESSION['email']) == '')
  {
   echo 'blah';
  } 

[Tailslide]

Wow that was quick!

Thank you both - I'm sure one or both will do the trick.

Is there any advantage to using empty() rather than checking is something doesn't equal ' '? Or is it just a faster, neater way of doing the same thing?

Edit: oooh... not seen === before... (goes to look it up).

[adam.jimenez]

=== means of same variable type as well as same value.

empty() or ==''

will give the same result. my way is quicker to type. the other way is more textbook.

[Tailslide]

Thanks!

[Cups]

Reposting the old "is it empty or set or is that null?" checklist, just so maybe a few more people will see it and then adopt " === " style checking and use var_dump() before doing any conditional code forks.

Hoping this helps you retain some sanity as you PHP.

[decowski]

empty() returns TRUE for the string '0' so it's not the same as comparing to an empty string:

$foo = '0';

if (empty($foo)) { // TRUE
    echo 'EMPTY';
}

if ($foo == '') { // FALSE
    echo 'EMPTY';
}