Export or dump your database tables on one click in codeigniter 3

ci-database-dump

<?php
defined('BASEPATH') or exit('No direct script access allowed');
class Dump extends CI_Controller
{
    public function index()
    {
    	$this->load->dbutil();
    	$tableList=$this->db->query("SELECT t.TABLE_NAME AS tablename FROM INFORMATION_SCHEMA.TABLES AS t WHERE t.TABLE_SCHEMA = 'database_name'")->result_array();  
    	if ($this->dbutil->database_exists('database_name'))
		  {	
			if(!empty($tableList)){
				$currentTime = date('Y-m-dH:i:s');
				$foldername = 'backup_'.$currentTime;
				$upload_path = APPPATH.'/cache/'.$foldername;
				if (!is_dir( $upload_path)) {
					mkdir( $upload_path, 0777, TRUE);
				}
				foreach ($tableList as $table) {
					
						 $prefs = array(
						        'tables'        => [$table['tablename']],
						        'format'        => 'sql',
						        'add_drop'      => TRUE,            
						        'add_insert'    => TRUE,   
						        'newline'       => "\n"         
						);
				    	$backup = $this->dbutil->backup($prefs);
						$this->load->helper('file');
						write_file($upload_path.'/'.$table['tablename'].'.sql', $backup);
				}

				// Get real path for our folder

				// Initialize archive object
				$zip = new ZipArchive();
				$zip->open($upload_path.'.zip', ZipArchive::CREATE | ZipArchive::OVERWRITE);

				// Create recursive directory iterator
				/** @var SplFileInfo[] $files */
				$files = new RecursiveIteratorIterator(
				    new RecursiveDirectoryIterator($upload_path),
				    RecursiveIteratorIterator::LEAVES_ONLY
				);

				foreach ($files as $name => $file)
				{
				    // Skip directories (they would be added automatically)
				    if (!$file->isDir())
				    {
				        // Get real and relative path for current file
				        $filePath = $file->getRealPath();
				        $relativePath = substr($filePath, strlen($upload_path) + 1);

				        // Add current file to archive
				        $zip->addFile($filePath, $relativePath);
				    }
				}

				// Zip archive will be created only after closing object
				$zip->close();
				$this->deleteDir($upload_path);
				$this->load->helper('download');
				$file_content = file_get_contents($upload_path.'.zip'); // Read the file's contents
				if(file_exists($upload_path.'.zip')){
				    unlink($upload_path.'.zip');
				}
				force_download($foldername.'.zip', $file_content);


				
		      
			}
		}
    }
    public function deleteDir($dirPath) {
	    if (! is_dir($dirPath)) {
	        throw new InvalidArgumentException("$dirPath must be a directory");
	    }
	    if (substr($dirPath, strlen($dirPath) - 1, 1) != '/') {
	        $dirPath .= '/';
	    }
	    $files = glob($dirPath . '*', GLOB_MARK);
	    foreach ($files as $file) {
	        if (is_dir($file)) {
	            self::deleteDir($file);
	        } else {
	            unlink($file);
	        }
	    }
	    rmdir($dirPath);
   }
}