PHP/MySQL (MariaDB) - Uppdatera medelst kryssboxar

while($pay = $payer->fetch_object()){
		echo "\t\t\t<tr>\n";
		echo "\t\t\t\t<td><input type=\"text\" name=\"index[]\" value=\"" . $pay->aaid . "\" hidden>\n";
		echo "\t\t\t\t<td><input type=\"text\" name=\"member[]\" value=\"" . $pay->membnr . "\" hidden>\n";
		echo "\t\t\t\t<input type=\"text\" readonly value=\"" . $pay->firstn . " " . $pay->lastn . "\" style=\"width: 150px;\"></td>\n";
		echo "\t\t\t\t<td><select name=\"cost[]\">\n";
		foreach($cost as $key){
			echo "\t\t\t\t\t<option value=\"" . $key->id . "\"";
			if($pay->cost == $key->id){
				echo " selected";
				$costas = $key->cost;
			}
			echo ">" . $key->type . "</option>\n";
		}
		echo "\t\t\t\t</select></td>\n";
		echo "\t\t\t\t<td><input type=\"text\" name=\"amount[]\" value=\"" . $pay->amount . "\" style=\"width: 53px;\"></td>\n";
		echo "\t\t\t\t<td>(" . $costas*$pay->amount . "kr)</td>\n";
		echo "\t\t\t\t<td><input type=\"checkbox\" value=\"".$pay->aaid."\" name=\"paid[]\"";
		if($pay->paid==1){
			echo " checked";
		}
		echo "></td>\n";
		echo "\t\t\t\t<td><input type=\"checkbox\" value=\"".$pay->aaid."\" name=\"remove[]\"></td>\n";
		echo "\t\t\t</tr>\n";
	}

if(isset($_POST['remember'])){
	$index = $_POST['index'];
	$member = $_POST['member'];
	$ammocost = $_POST['cost'];
	$amount = $_POST['amount'];
	$paid = $_POST['paid'];
	$remove = $_POST['remove'];
	foreach($member as $key => $m){
		if(empty($m)){
			$godis="gott";
		}
		elseif(empty($amount[$key])){
			$godis="smaskens!";
		}
		elseif($remove[$key]){
			$query = "DELETE FROM member_activities WHERE aaid = '" . $remove[$key] . "'";
			$result = mysqli_query($connect, $query) or die("Det ville inte. " . mysqli_error($connect));
		}
		else{
			$query = "SELECT * FROM member_activities WHERE aaid = " . $index[$key];
			$result = mysqli_query($connect, $query) or die("Det ville inte. " . mysqli_error($connect));
			$isold = mysqli_num_rows($result);
			if($paid[$key]){
				$paid = 1;
			}
			else{
				$paid = 0;
			}
			if($isold == 0){
				$query = "INSERT INTO member_activities (activity, member, cost, amount, paid) VALUES('";
				$query .= $_GET['activity'] . "', '".$m."', '".$ammocost[$key];
				$query .= "', '".$amount[$key]."', '" . $paid . "')";
			}
			else{
				$query = "UPDATE member_activities SET member = '".$m."', cost = '" . $ammocost[$key] . "', amount = '".$amount[$key]."', ";
				$query .= "paid = '".$paid."' WHERE aaid = ".$index[$key];
			}
		unset($godis);
		$result = mysqli_query($connect, $query) or die("Det gick inte att spara deltagare. " . mysqli_error($connect));
		}
	}
}