error inserting multiple values database php


Can someone explain me why this is not working, Im trying to insert multiple values into a database, first I was inserting carpirces only and was working, but now Im trying to insert also de Ids but now the code don't work

if(!empty($_POST)) { $query = "INSERT INTO prices (carid, vendorid, carprice) values (:carid, 2, :carprice)"; $query_params = array(':carprice' => $_POST['carprice']); $price = null; $carids = null; try { $stmt = $db->prepare($query); $stmt->bindParam(':carprice', $price); foreach($_POST['carprice'] as $value) { $price = $value; $stmt->execute(); } $stmt->bindParam(':carid', $carids); foreach($_POST['carid'] as $value) { $carids = $value; $stmt->execute(); } } catch(PDOException $ex) { die("Error 1 " . $ex->getMessage()); } header("Location: update.php"); die("Rendirecting to update.php"); } ?> <form action="prices.php" method="post"> <table border=1> <tr> <th>Id</th> <th>car</th> <th>model</th> <th>Price</th> </tr> <?php foreach($rowscars as $row): ?> <tr> <th><input type="hidden" name="carid[]" value="<?php echo ' ' . htmlentities($row['carid'], ENT_QUOTES, 'UTF-8') . ' ';?>" /><?php echo '' . htmlentities($row['carid'], ENT_QUOTES, 'UTF-8') . '';?></th> <th><?php echo '' . htmlentities($row['car'], ENT_QUOTES, 'UTF-8') . '';?></th> <th><?php echo '' . htmlentities($row['model'], ENT_QUOTES, 'UTF-8') . '';?></th> <th><input type="text" name="carprice[]" value=""></th> </tr> <?php endforeach; ?> </table> <input type="submit" value="Submit"> </form>


I suppose you want to insert carPrice for specified carId. First you need to map each car id to car price, do smth like this:

if (!empty($_POST['carid'] && $_POST['carprice']) { $carPrices = array_combine($_POST['carid'], $_POST['carprice']); foreach ($carPrices as $carId => $carPrice) { $stmt = $db->prepare($query); $stmt->bindParam(':carprice', $carPrice); $stmt->bindParam(':carid', $carId); $stmt->execute(); } }


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