<?php
ini_set('display_errors', 1);
ini_set('display_startup_errors', 1);
error_reporting(E_ALL);


$zipfile = "dumps.zip";

if (isset($_GET['cleanup_dump']) && $_GET['cleanup_dump'] == 1)
{
    Cleanup();
    die("Cleanup done");
}


$dumps_path = 'dumps/';
if(file_exists($dumps_path))
{
    array_map( 'unlink', array_filter((array) glob($dumps_path.'*') ) );
}
else
{
    mkdir('dumps');
}

//read php file with credentials and parse it
fopen("credentials.php", "r") or die("Unable to open file!");
include 'credentials.php';
//should priovide the following variables:
// $db_host = 'host';
// $db_user = 'user';
// $db_pass = 'pw';

if ($db_host == NULL || $db_user == NULL || $db_pass == NULL) {
    die("Please provide credentials in credentials.php");
}

$db_conn = new mysqli($db_host, $db_user, $db_pass);

$result = mysqli_query($db_conn,"SHOW DATABASES");
while ($row = mysqli_fetch_array($result)) {

    if($row[0] == 'information_schema' || $row[0] == 'performance_schema')
    {
        continue;
    }

    $database = $row[0];
    $dir = dirname(__FILE__) . '/'.$dumps_path.$database.'.sql';

    exec("mysqldump --user={$db_user} --password={$db_pass} --host={$db_host} {$database} --result-file={$dir} 2>&1", $output);
    if(!empty($output))
    {
        var_dump($output);
    }
}


## Zip all dumps

Cleanup($zipfile);
$zip = new ZipArchive;
if($zip -> open($zipfile, ZipArchive::CREATE ) === TRUE)
{
    $dir = opendir($dumps_path);
    while($file = readdir($dir)) {
        if(is_file($dumps_path.$file)) {
            $zip -> addFile($dumps_path.$file, $file);
        }
    }
    $zip ->close();
}

//eine funktion die auf den url parameter cleanup_dump=1 reagiert und dann alle dumps löscht
function Cleanup()
{
    global $zipfile;

    if(file_exists($zipfile))
    {
        unlink($zipfile);
    }
}