export_data.php

<?php
  $excludeArgs = "--exclude=data/log* --exclude=data/images/archive* --exclude=data/mysql";
  $workingDir = "/var/www/";
  $exportDir = "data";
  $wgSitename = "mywiki";
  $wgLanguageCode = "all";
  $IP = "w";
  $tokenFile = "/var/www/data/.export_token";

  if ( "?ACCESS_TOKEN?" === $_GET["token"] ) {

    //require "$IP/LocalSettings.custom.php" ;

    $filename=strtolower($wgSitename."-".$wgLanguageCode."_".date('Y-m-d'));

    if (isset($_GET["format"]) && $_GET["format"] == "tar") {
      $type="x-tar";
      $ext="tar";
      $cmd="tar -C ".$workingDir." -c ".$excludeArgs." ".$exportDir;
    } else {
      $type="x-bzip2";
      $ext="tar.bz2";
      $cmd="tar -C ".$workingDir." -cj ".$excludeArgs." ".$exportDir;
    }

    $headerContentType = "Content-Type: application/".$type;
    $headerContentDisposition = "Content-Disposition: attachment; filename=\"".$filename.".".$ext."\"";

    header($headerContentType);
    header($headerContentDisposition);
    passthru($cmd,$err);

  } else
    http_response_code(401);

  exit();
?>