php script to update mysql table on click of link - php

Question

I'm new to php and need help.
My link as below:
//create a path to download
echo '<a download="Final_File_'.$filenames.'" name="save" href="'.$DownDir. "/".$filenames.'" target="_blank"><img src="images/Save File.png"/></a>';
//Query
$Query = 'UPDATE `tbl_download_log` SET `User_Id` = `User_Id`, `path` = `$DownDir. "/".$filenames`';
Saves a file on the click of the ImageLink and need to update the a table in MySQL DB named tbl_download_log with the 'user ID' & 'Download link' at the same time.
I established the connection and got the user ID as well.
Please help me to update both the thing in db table.
Updating new script in it.
<?php
$DownDir = "http://localhost/SGA-INTRANET/".$kmsroot. "/". $user. "/". $bu. "/". $client. "/". $project."/Final";
$filenames = "file.xlsx";
$pathDown1 = $DownDir. "/".$filenames;//download path
//using download functionality of HTML 5
echo '<a download="Final_File_'.$filenames.'" name="save" href="'.$pathDown1.'?id='.$name.'&filepath='.$pathDown1.'" target="_blank"><img src="images/Save File.png" title="Download the file"/></a>';
?>
<?php
$ide = $_GET['id'];//EmployeeID
$file = $_GET['filepath'];// Path
if(isset($ide) && isset($file))
{
if(file_exists($file))
{
//save log to DB table 'tbl_km_file_download'
$mysqli = new mysqli("localhost", "USERNAME", "PASSWORD", "DBNAME");
$mysqli->query("INSERT INTO `tbl_km_file_download` (`name`, `filename`) VALUES ('$ide', '$file')");
}
}
?>
which is downloading files but not updating the DB table.
Please see the images.
Please help.

Answer 1

You can pass data through the href with query strings.
Example
echo 'CLICK THE LINK';
$file should be a root-relative path, starting with a /.
Then in download.php:
<?php
$id = $_GET['id'];
$file = $_GET['file'];
if(isset($id) && isset($file)) {
if(file_exists($file)) {
//connect to database .... (I show it with PDO)
$db = new PDO('mysql:host=localhost;dbname=DATABASENAME;charset=utf8', USERNAME, PASSWORD);
$stmt = $db->prepare("INSERT INTO `tbl_download_log` (`User_Id`, `path`) VALUES (?, ?)");
$stmt->execute(array($id, $file));
//download the file....
header('Content-Description: File Transfer');
header('Content-Type: application/octet-stream');
header('Content-Disposition: attachment; filename='.basename($file));
header('Content-Transfer-Encoding: binary');
header('Expires: 0');
header('Cache-Control: must-revalidate, post-check=0, pre-check=0');
header('Pragma: public');
header('Content-Length: ' . filesize($file));
ob_clean();
flush();
readfile($file);
} else echo "The file does not exist.";
} else echo "An error occurred.";
Hope this helps.