Php update multiple row with checkbox - php

Question

Hello i would like to UPDATE all the row with a Boolean ( 1 ) when i check the checkbox , but i can't do it when i try.. He select and update all "$id" or update only the last $id of my cours table.
Someone can help ? :)
EDIT :
<form action='' method='POST'>
<?php
require 'inc/db.php';
$req = $pdo->query('SELECT * FROM cours WHERE isValid = 0' );
while ($row = $req->fetch(PDO::FETCH_ASSOC)) {
$originalDate = $row['date'];
$newDate = date("d-m-Y", strtotime($originalDate));
$id = $row['id'];
echo "<tr>";
echo "<td>" . htmlspecialchars($newDate) . "</td>";
echo "<td>" . htmlspecialchars($row['hours']) . "</td>";
echo "<td>" . htmlspecialchars($row['iduser']) . " / " . htmlspecialchars($row['lastname']) . " / " . htmlspecialchars($row['firstname']) . "</td>";
echo "<td>" . htmlspecialchars($row['courses']) . "</td>";
echo "<td><input type='checkbox' name='check[$id]' value='1' >" . $id . "</td> ";
print "</tr>";
}
print "</table>";
if(isset($_POST['check']) && count($_POST['check'] )) {
$ids = implode($_POST['check']);
$req2 = $pdo->prepare("UPDATE cours SET isValid = 1 WHERE id IN ({$ids})");
$req2->execute();
var_dump($_POST['check']);
}
?>
<button type="submit" name="send" class="btn btn-primary center-block" >send</button>
</form>

Answer 1

if(isset($_POST['check']) && count($_POST['check'])) {
$ids = implode(', ', $_POST['check']);
$sql = "UPDATE cours SET isValid = 1 WHERE id IN ({$ids})";
//run sql
}
Of course, it's still as vulnerable to sql injection as your current code. You'd want to either ensure all the ids are actually integers, or use parameters in your statement.
You may be having trouble debugging this, because you put your var_dump outside the loop. So you're only ever going to SEE the last id.