I have created this page to get data from the database, with links to print the shown data and delete it afterwards.
One of the problems is that the JavaScript print function window.print(); wont work.
Another problem is that after printing the page, I would like to update the database, so people can see that it has been printed before.
Alternatively, the function could also print the page and then immediately deletes data, so people won't need to see if it has been printed before or not.
This is the code for getting the data from the database:
<html>
<header>
<script>
function print_table(id)
{
//print your document
window.print();
//send your data
xmlhttp=new XMLHttpRequest();
xmlhttp.open("GET","http://localhost/Stage/printed_table.php" + id;
xmlhttp.send();
}
</script>
</header>
<body>
<?php
$servername = "localhost";
$username = "root";
$password = "";
$dbname = "depits";
// Create connection
$conn = mysqli_connect($servername, $username, $password, $dbname);
// Query the database
$resultSet = $conn->query("SELECT * FROM orders");
// Count the returned rows
if($resultSet->num_rows != 0){
// Turn the results into an Array
while($rows = $resultSet->fetch_assoc())
{
$id = $rows['id'];
$naam = $rows['naam'];
$achternaam = $rows['achternaam'];
$email = $rows['email'];
$telefoon = $rows['telefoon'];
$bestelling = $rows['bestelling'];
echo "<p>Name: $naam $achternaam<br />Email: $email<br />Telefoon: $telefoon<br /> Bestelling: $bestelling<br /> <a href='delete.php?del=$id'>Delete</a> <input type='button' onclick='print_table($id)' value='Print Table' /> </p>";
}
// Display the results
}else{
echo "Geen bestellingen";
}
?>
</body>
</html>
and these are the pages for the two server-side functions:
delete.php
<?php
$servername = "localhost";
$username = "root";
$password = "";
$dbname = "depits";
// Get ID
$id = $_GET['del'];
$sql= "DELETE FROM orders WHERE id=" . $id . "";
// Create connection
$conn = mysqli_connect($servername, $username, $password, $dbname);
// Query the database
$resultSet = $conn->query($sql) or die("Failed".mysql_error());
echo "<meta http-equiv='refresh' content='0;url=http://localhost/Stage%201/bestellingen.php'>";
?>
print_table.php
<?php
$servername = "localhost";
$username = "root";
$password = "";
$dbname = "depits";
// Create connection
$conn = mysqli_connect($servername, $username, $password, $dbname);
// Query the database
$id = $_GET['id'];
$resultSet = $conn->query("UPDATE `orders` SET `printed` = 1 WHERE `id` = `$id`");
?>
You should really check your browser console (F12) to see if there are any JavaScript errors.
One really glaring error I could spot is this line, where the brackets aren't closed. These type of errors could be easily fixed just by checking the console first.
Another error is the variable in the string, it should be sent as a ?key=value pair.
xmlhttp.open("GET","http://localhost/Stage/printed_table.php" + id;
should be:
xmlhttp.open("GET","http://localhost/Stage/printed_table.php?id=" + id, true);
Another problem would be the URL the above line is calling. I notice you mentioned that your PHP file name is called print_table.php instead of printed_table.php.