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// Include the common file containing the database connection
require "common.php";
// Grab the POSTed id if any
$id = filter_input(INPUT_POST, 'id', FILTER_SANITIZE_NUMBER_INT);
// If it's not null that means the form has been submitted
if (!is_null($id)) {
// Get the POSTed make
$make = filter_input(INPUT_POST, 'make', FILTER_SANITIZE_STRING);
if ($id > 0) {
// Prepare the statement
$stmt = $dbh->prepare('UPDATE makes SET make = :make WHERE id = :id');
$stmt->bindParam(':id', $id, PDO::PARAM_INT);
} else {
$stmt = $dbh->prepare("INSERT INTO makes (make) VALUES (:make)");
// Bind the params into our statement
$stmt->bindParam(':make', $make, PDO::PARAM_STR);
// Execute the statment which will update the database
// redirect back to index.php
header("Location: index.php");
// Filter the id which we are GETting from the query string (passed by index.php)
$id = filter_input(INPUT_GET, 'id', FILTER_SANITIZE_NUMBER_INT);
// Prepare the statement
$stmt = $dbh->prepare('SELECT * FROM makes WHERE id = :id');
// Execute the statment and get the record
$stmt->execute(['id' => $id]);
// Fetch the data as an object
$row = $stmt->fetch(PDO::FETCH_OBJ);
<!DOCTYPE html>
<html lang="en">
<meta charset="utf-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1">
<!-- The above 3 meta tags *must* come first in the head; any other head content must come *after* these tags -->
<meta name="description" content="">
<meta name="author" content="">
<title>Cars example - edit make</title>
<!-- Bootstrap -->
<link href="css/bootstrap.min.css" rel="stylesheet">
<!-- HTML5 shim and Respond.js for IE8 support of HTML5 elements and media queries -->
<!-- WARNING: Respond.js doesn't work if you view the page via file:// -->
<!--[if lt IE 9]>
<script src=""></script>
<script src=""></script>
// Include the header file
require "header.php";
<div class="container" style="margin-top: 60px;">
<h1>Edit Car Make</h1>
<form action="edit.php" method="POST">
<input type="hidden" name="id" value="<?php echo $row->id;?>">
<div class="form-group">
<label for="make">Make</label>
<input type="text" required class="form-control" id="make" name="make" placeholder="Make" value="<?php echo isset($row->make) ? $row->make : "";?>">
<button type="submit" class="btn btn-default">Submit</button>
// Include the footer file
require "footer.php";
<!-- jQuery (necessary for Bootstrap's JavaScript plugins) -->
<script src=""></script>
<!-- Include all compiled plugins (below), or include individual files as needed -->
<script src="js/bootstrap.min.js"></script>
// End of edit.php