added database download script

post.php

@@ -74,6 +74,81 @@ if(isset($_POST['edit_invoice_settings'])){
 
 }
 
+if(isset($_GET['download_database'])){
+
+    // Get All Table Names From the Database
+    $tables = array();
+    $sql = "SHOW TABLES";
+    $result = mysqli_query($mysqli, $sql);
+
+    while ($row = mysqli_fetch_row($result)) {
+        $tables[] = $row[0];
+    }
+
+    $sqlScript = "";
+    foreach ($tables as $table) {
+        
+        // Prepare SQLscript for creating table structure
+        $query = "SHOW CREATE TABLE $table";
+        $result = mysqli_query($mysqli, $query);
+        $row = mysqli_fetch_row($result);
+        
+        $sqlScript .= "\n\n" . $row[1] . ";\n\n";
+        
+        
+        $query = "SELECT * FROM $table";
+        $result = mysqli_query($mysqli, $query);
+        
+        $columnCount = mysqli_num_fields($result);
+        
+        // Prepare SQLscript for dumping data for each table
+        for ($i = 0; $i < $columnCount; $i ++) {
+            while ($row = mysqli_fetch_row($result)) {
+                $sqlScript .= "INSERT INTO $table VALUES(";
+                for ($j = 0; $j < $columnCount; $j ++) {
+                    $row[$j] = $row[$j];
+                    
+                    if (isset($row[$j])) {
+                        $sqlScript .= '"' . $row[$j] . '"';
+                    } else {
+                        $sqlScript .= '""';
+                    }
+                    if ($j < ($columnCount - 1)) {
+                        $sqlScript .= ',';
+                    }
+                }
+                $sqlScript .= ");\n";
+            }
+        }
+        
+        $sqlScript .= "\n"; 
+    }
+
+    if(!empty($sqlScript))
+    {
+        // Save the SQL script to a backup file
+        $backup_file_name = date('Y-m-d') . '_' . $config_company_name . '_backup.sql';
+        $fileHandler = fopen($backup_file_name, 'w+');
+        $number_of_lines = fwrite($fileHandler, $sqlScript);
+        fclose($fileHandler); 
+
+        // Download the SQL backup file to the browser
+        header('Content-Description: File Transfer');
+        header('Content-Type: application/octet-stream');
+        header('Content-Disposition: attachment; filename=' . basename($backup_file_name));
+        header('Content-Transfer-Encoding: binary');
+        header('Expires: 0');
+        header('Cache-Control: must-revalidate');
+        header('Pragma: public');
+        header('Content-Length: ' . filesize($backup_file_name));
+        ob_clean();
+        flush();
+        readfile($backup_file_name);
+        exec('rm ' . $backup_file_name); 
+    }
+
+}
+
 if(isset($_POST['add_user'])){
 
     $name = strip_tags(mysqli_real_escape_string($mysqli,$_POST['name']));