help with isset ?

[aron]

ok im trying to retreive a checkbox value if its checked then the value = 1 of its not then thee is no value ""

so i use this

if (isset($POST['air_con']))
$air_con1 = $POST['air_con'];
{
if ($air_con1 == "");
$air_con = "0";
echo "$air_con";
}

if i dont use the isset part it says that value for air_con is not set if i do and the box is checked the value is "" if its not checked than the value is "0" whats going wrong.

it should say if the box is checked than the value is 1 if no then 0

also do i need to set the variable air_con 1 or can i just use air_con over again.

cheers aron.

[aron]

ok i got it i did this...

if (isset($POST['air_con']))
{
$air_con = $POST['air_con'];
}
else
{
$air_con = "0";
}
echo "$air_con";

but is there an easer way

cheers aron.

[Weedpacket]

That's how HTML form checkboxes work. Read the standard if you don't believe me 🙂

$air_con = isset($_POST['air_con']) ? 1 : 0;
echo $air_con;

Which has the bonus effect of ensuring that someone doesn't put together a bogus form that sticks something else into $_POST['air_con'].

In fact, if all you need to know is whether it was checked or not (and that's really all there is to know about a checkbox):

$air_con = isset($_POST['air_con']);


if($air_con)
{  echo 'air_con checked';
}
else
{ echo 'air_con not checked';
}

[aron]

thanks

[aron]

ok that works for checkboxes what about text fields.

if (isset($POST['carport']))
{
$carport = $POST['carport'];
}
else
{
$carport = "0";
}
echo "this is the carport $carport";

i have a text field "carport"

you can type a number in there but if you leave it blank the above script is ment to assign carpot = 0 but it dosent work.

everythings fine if you type a number in eg. 3 but if you leave it blank it stuffs the insert statement up stops it from inserting into the database.

cheers aron.

[Weedpacket]

you can type a number in there but if you leave it blank the above script is ment to assign carpot = 0 but it dosent work.

Should do. Are you sure the problem is that and not something else?

[aron]

i dunno that whats causing the problem, i did a echo to show the results and it didnt work..

its screwing up my insert because it dosent allow nill.

aron.

[aron]

its getting realy anoying

[udendra]

I often use ,

if ( isset($_POST['carport']) && ($_POST['carport']!="") ) 
{ 
$carport = $_POST['carport']; 
} 
else 
{ 
$carport = "0"; 
} 

thats to ensure that the value submitted is not empty, and contains something..

cos, though you leave your text field value empty, still $_POST['carport'] will be set.

[maqmus]

Maybe this way:

if($_POST['carport']>"")
{
$carport = $_POST['carport'];
}
else
{
$carport = "0";
}