Form not reconizing '0' as valid post

dr_overload

Within my form I use the following to ensure all fields are completed.

if (!$_POST['field1]);
die

However my problem is the details enter in the form fields are numbers and when '0' zero is entered the script is saying field not completed, can I add something to code to reconize '0' zero as a vaild entry.

Thanks

iwanpattyn

if ($_POST['field1']=="");

dr_overload

Thanks iwanpattyn,

Just tried that - but unfortunately still saying field not complete

iwanpattyn

please post your form and the php that handles the form data...

madwormer2

if(empty($_POST['field1'])){
die;
}

This will check to see if it is empty. The user can enter 0 here fine, and it will recognise as a value.

jdorsch

This is incorrect as '==' equates "", 0, null, or false all as false.

iwanpattyn wrote:
if ($_POST['field1']=="");

This would work though as '===' means exactly equal

if( $_POST['field1'] ==="" )

madwormer2

Yes, but even still, doesn't it make more sense to just ask if/B if you want to know if a variable is empty?

:p

jdorsch

madwormer2 wrote:
Yes, but even still, doesn't it make more sense to just ask if/B if you want to know if a variable is empty?

:p

Yes, you are correct, the method you suggested is more semantic and proper. I was just pointing out why the '==' did not work.

PABobo

if( $_POST['field1'] <="0" )

PABobo

sorry wrong answer
if($_POST[field1] != NULL) {
echo "np";
}
else {
die;
}

Drakla

Notes on empty():
"PHP 4 As of PHP 4, The string value "0" is considered empty. "

If you're just looking for any content whatsoever that isn't whitespace you could use

if (strlen(trim($yourValue)))
{
    echo 'Rah!';
}
else
{
    echo 'bad boy, get to bed';
}

and of course at the end of the day there's always regex for those moments when you have to get intimate with your data.

madwormer2

Then use !isset() 😛