Checkbox array s mysql

$_SESSION['sess_checkbox'] = $_POST['sess_checkbox'];
$sess_checkbox = $_SESSION['sess_checkbox'];

if(isset(sess_checkbox)) {
foreach(sess_checkbox as $index) {
  $c = MySQL_Query("SELECT * FROM tabulka");
  while ($row = MySQL_Fetch_Array($c)) {

     if($row['IDcheckbox'] == '$index') {
     echo "<input type='checkbox' name='checkbox', checked>";
     }
     else {     
     echo "<input type='checkbox' name='checkbox'>";     
     
      }
    } 
  }
}

if(isset($_SESSION['sess_checkbox'])) {

    $c = MySQL_Query("SELECT * FROM tabulka");
    while ($row = MySQL_Fetch_Array($c)) {

     if($row['IDcheckbox'] == '$index') {
     echo "<input type='checkbox' name='checkbox' checked>";
     }
     else {     
     echo "<input type='checkbox' name='checkbox'>";     
     
      }
    }

    foreach($_SESSION['sess_checkbox'] as $index) {

   }
}

<input type='checkbox' name='sess_checkbox[]' value='".$row['IDcheckbox']."'>

...

$res = mysql_query("SELECT IDcheckbox FROM tabulka");

while(list($IDcheckbox) = mysql_fetch_row($res))
{
   $checked = (in_array($IDcheckbox, $_SESSION['sess_checkbox'])) ? ' checked = "checked"' : '';

   echo "<input type='checkbox' name='sess_checkbox[]' value='".$IDcheckbox."'".$checked.">";
}

$res = mysql_query("SELECT IDcheckbox, Nazov1 FROM tabulka");

while(list($IDcheckbox,$Nazov1) = mysql_fetch_row($res))
{
   $checked = (in_array($IDcheckbox, $_SESSION['sess_checkbox'])) ? ' checked = "checked"' : '';

   echo "<input type='checkbox' name='sess_checkbox[]' value='".$IDcheckbox."'".$checked.">";
   echo "".$Nazov1."";
}