using for loop in function

The function below will create a group of checkboxes it will also check the checkbox that is stored in the table field that is in $select_value this works fine if there is only one value in the variable but if there is more stored like 1,2,3,4 it will not work. I am trying to figure out how to use the following for loop to add the number to each checkbox and if they match mark the checkbox checked $ExplodeIt = explode(",",$select_value,","); $Count = count($ExplodeIt); for ($i=0; $i < $Count; $i++) { } function checkbox($sqlu,$name,$value1,$value2,$select_value){ $name_result = safe_query($sqlu); while($rowu=mysql_fetch_array($name_result)){ echo "<tr><td colspan=\"2\" align=\"left\"><input type='checkbox' name='" . $name . "[" . $rowu[$value1] . "]' value=\"$rowu[$value1]\""; if($select_value==$rowu[$value1]) { echo " checked>$rowu[$value2]\n</td></tr><BR>"; }else{ echo ">$rowu[$value2]\n</td></tr><BR>"; } } }