$stmt = $mysqli->prepare("INSERT INTO table (id1, id2) VALUES (?,?)");
$id1 = 1;
foreach( $_POST['id'] as $id2);
$stmt->bind_param("ss", $id1, $id2);
$stmt->execute();
}
<?php
$now = new DateTime();
$date = new DateTime('2020-05-10');
$diff = $date->diff($now)->format("%a");
var_dump($diff);
echo "<tr>";
for ($j = 0 ; $j < count($row) ; ++$j) {
echo "<td>";
echo htmlspecialchars_decode($row[$j]);
echo "</td>";
}
echo "</tr>";