TCPDF how do I create several pdf's without opening a browser - tcpdf

Question

I need to create like 350 pdf's at once. Now the browser opens a window for each pdf. I takes longer to open all the 350 windows than to create the pdf's. How do I create and save the pdf's without opening a browser windows? (In my pdf I use Header, body and footer all with variables)
Now I do a loop on php_page_1 which opens the pdf create file.
$sql = "SELECT id FROM shipping_id WHERE datum BETWEEN $date_range AND acc_id=$acc_id;";
$STH = $dbo->prepare( $sql );
$STH->execute();
$contains_files = 0;
$client_id='';
while ( $row = $STH->fetch( PDO::FETCH_ASSOC ) ) {
$contains_files++;
$link = "vb_print_1_no_screen.php?id=" . $row[ 'id' ] . "&nr=".$contains_files;
echo '<script>window.open("https://' . $website_admin . $link . '");</script>';
}

Answer 1

You can use curl to make the request to the URL instead of opening it directly in the browser or you can just include the file that generates the PDF. Try this code
$sql = "SELECT id FROM shipping_id WHERE datum BETWEEN $date_range AND acc_id=$acc_id;";
$STH = $dbo->prepare( $sql );
$STH->execute();
$contains_files = 0;
$client_id='';
while ( $row = $STH->fetch( PDO::FETCH_ASSOC ) ) {
$contains_files++;
$link = "vb_print_1_no_screen.php?id=" . $row[ 'id' ] . "&nr=".$contains_files;
// echo '<script>window.open("https://' . $website_admin . $link . '");</script>';
// method 1 using curl
$ch = curl_init();
curl_setopt($ch, CURLOPT_URL, $website_admin . $link);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
$return = curl_exec($ch);
curl_close($ch);
// method 2 include pdf generator script
$_GET['id'] = $row['id'];
$_GET['nr'] = $contains_files;
include "vb_print_1_no_screen.php";
}
Kindly make sure to use just one method.