NYCPHP Meetup

[Chris Snyder]

Analysis & Solutions wrote:

>I just learned something interesting while confirming stuff:
>
>    $bar = 0;
>    if ($bar == '') {
>        echo '<br />bar equals empty';
>    }
>
>This comparison will evaluate to true, so the message will be printed.
>
>  
>
Which was really the whole point of this exercise -- but you dropped 
another hint there with the strict comparison operator (===).
In "standard" style this time:

    if ( isset($foo) ) {
        if ( $foo==='' ) {
            print "foo is an empty string.";
        }
    }

And that's all we really needed: a fine lesson in strict vs loose 
comparison.
http://www.php.net/manual/en/types.comparisons.php