newbie ? about form fields & nulls

Anon

Can someone tell me why this is not working the way I think it should?

a. why is 'is_null()' not working
b. how can I use a boolean variable

Thanks for your help

$msg = 'Please enter your: ';
$form_filled = 1;
if ( is_null($first_name)) {
$msg .= $rtn . 'First name';
$form_filled = 0;
}
if ( is_null($last_name)) {
$msg .= $rtn . 'Last name ';
$form_filled = 0;
}
if ( is_null($message)){
$msg .= $rtn . 'Message ';
$form_filled = 0;
}

if ($form_filled = 1) {	
	if (mail($to, $subject, $mesg))
		$msg = '<font color="#FF0000">Thank You  '. $first_name. ', your e-mail has been sent.</font>  <br> <br>';
	else
		$msg = '<font color="#FF0000">Were sorry  '. $first_name. ', but your e-mail was not sent.  Please call us.';
}

dewcansam

try using empty insted of is_null

if (empty($first_name))
{
$msg .= "$rtnFirst name";
$form_filled = 0;
}

Anon

Thanks Chris...
BUT something else is way wrong...

$form_filled = 1;
$form_filled = 0;

if ( empty($first_name)) {
$form_filled = 0;
}
if ($form_filled = 1) {
POINT ABC}

In the above code, the code is executing at POINT ABC...

how is that possible?

thanks

Anon

$form_filled = 1 is true
$form_filled = 0 is false

if ($form_filled) is how you check it

amcgrath

2 == to compare...
if ($form_filled == 1) {

amcgrath

when a var's value is 0, PHP will see that as false...