$_POST of empty vs 0 value

[elazary]

working on LINUX I found that both empty($_POST['foo']) where $foo = 0 or &foo = empty gives me TRUE.
I.e. I can not distingush between 0 and empty value - I need it for the text box value.
What is the solution?

[Adrian2k4]

this is from the php manual: (http://ch2.php.net/empty)
"empty() returns FALSE if var has a non-empty and non-zero value. In otherwords, "", 0, "0", NULL, FALSE, array(), and var $var; are all considered empty. In PHP 4 and earlier, objects with empty properties are considered empty. This is not the case in PHP 5. TRUE is returned if var is empty."

i'm not if this works... try something like "is_null" "is_int()" or "isset()".

or

test the following:
<?php
echo strlen('0');
echo strlen('');
echo strlen(NULL);
?>

regards
adrian

[mincklerstraat]

Hi elazary, welcome to webmasterworld [webmasterworld.com]. Have a look at

isset()

[be.php.net]

<edit>ah, Adrian2K4: Jinx!</edit>

[elazary]

thanks, guys
strlen works, all other do not help
elazar

[coopster]

As has been stated, empty() [php.net] returns FALSE only if the variable being checked has a non-empty and non-zero value. You could always use exact Comparison Operators [php.net] to check the value.