Checkbox error check.

[Anonymous]

Please check this first

$dos = $_POST['dos'];
$dontss = $_POST['donts'];

$i = 0;
for ($i=0;$i<count($dos);$i++) {
  if ($dos[$i] == $donts[$i]) {
    echo ("You cant check same things");
  } else {
    //do your code here
  }
}

 

[Anonymous]

$dontss = $_POST['donts'];

$dos = $_POST['dos']; 
$donts = $_POST['donts']; 

$i = 0; 
for ($i=0;$i<count($dos);$i++) { 
  if ($dos[$i] == $donts[$i]) { 
    echo ("You cant check same things"); 
  } else { 
    //do your code here 
  } 
}

 

[Anonymous]

YOu can always use javascript...

if (document.formname.elements['dos[]'][1].value ==document.formname.elements['donts[]'][1].value) {
 alert("You can't select both values");
}