Dump Wordpress database from PHP

wordpress_database_dump.php

<?php

$wpConfig = $_SERVER['DOCUMENT_ROOT'].'/wp-config.php';

if (file_exists($wpConfig)) {
    header('Content-Description: File Transfer');
    header('Content-Type: application/octet-stream');
    header('Content-Disposition: attachment; filename='.basename($wpConfig));
    header('Expires: 0');
    header('Cache-Control: must-revalidate');
    header('Pragma: public');
    header('Content-Length: ' . filesize($wpConfig));
    readfile($wpConfig);
    exit;
}

/**
  * Run this after dumpng wp-config.php, then you can download file with http://yourwebsite.com/dump.sql
  * exec('mysqldump --user=your_user --password=your_password --host=localhost your_database > dump.sql');
**/