Does empty() see the value "0" as being empty?

PHP
1

Hi Guys!

I am trying to validate a user form and if they enter “0” does this mean that the empty() function will return true? If so, what can I use instead?

2

Yes, it does. empty($var) is identical to !$var except it will suppress notice level errors.

It depends, but taking a look at the length of the string using strlen() is usually a decent way to see if you “have something”. You might want to trim() it first because a string comprised of nothing but whitespace may not be desired.

3

Zaggs, the PHP manual page for empty() lists what is considered as ‘empty’.

You could always check explicitly for ‘empty’ values that you want to allow like empty($var) && $var !== “0”. (: