Validate at least one checkbox selected

[aldrin151]

Hello everyone...I'm having a bit of a problem with validating a group of checkboxes...for example I have

 

$fldalgebra_checkbox

$fldcalculus_checkbox

$fldgeometry_checkbox

$fldtrigonometry_checkbox

 

At least one of these fields need to be checked for the form not to generate any FormErroMessage "Please check at least one of these fields".

 

I tried if ($fldalgebra_checkbox != "1" || $fldcalculus_checkbox != "1"){

$sEditInterestsErr .= "Please check at least one of these fields.</br>";

}

 

This doesn't work for obvious reasons...Can someone help me use a method that works?

 

Regards

 

Aldrin 

 

[lemmin]

The name and value of the checkbox will not get put into the $_GET or $_POST array if it is not checked so you can just check if they are set:

if (!isset($_GET['fldalgebra_checkbox']) || [...])
   echo "One is not set";