sucht alle .htaccess Dateien und ersetzt den Inhalt gegen Anweisungen, die vom Apache 2.4 interpretiert werden können.

replace.php

<?php

function rglob($pattern, $flags = 0) {
    $files = glob($pattern, $flags); 
    foreach (glob(dirname($pattern).'/*', GLOB_ONLYDIR|GLOB_NOSORT) as $dir) {
        $files = array_merge($files, rglob($dir.'/'.basename($pattern), $flags));
    }
    return $files;
}

foreach (rglob('.htaccess') as $filename) 
{
  $filename = realpath ($filename);
  $tmpfilename = str_replace('.htaccess', '.htaccess.backup', $filename);
  
  if (!copy($filename, $tmpfilename)) {
    echo 'can\'t copy $filename ...' . PHP_EOL;
  }
  
  echo PHP_EOL . ' read $filename ' . PHP_EOL;
  
  $arrZeilen = file($filename);
  
  $content = '';
  
  foreach ($arrZeilen as $zeile) 
  {
    $zeile = preg_replace ( '/[^a-z]/', '', strtolower($zeile) );
    $zeile = preg_replace ( '/orderallowdeny/', '<IfModule !mod_authz_core.c>' . PHP_EOL . '  Order allow,deny', $zeile );
    $zeile = preg_replace ( '/orderdenyallow/', '<IfModule !mod_authz_core.c>' . PHP_EOL . '  Order deny,allow', $zeile );
    
    $zeile = preg_replace ( '/denyfromall/', '  Deny from all' . PHP_EOL . '</IfModule>' . PHP_EOL . '<IfModule mod_authz_core.c>' . PHP_EOL . '  Require all denied' . PHP_EOL . '</IfModule>', $zeile );
    $zeile = preg_replace ( '/allowfromall/', '  Allow from all' . PHP_EOL . '</IfModule>' . PHP_EOL . '<IfModule mod_authz_core.c>' . PHP_EOL . '  Require all granted' . PHP_EOL . '</IfModule>', $zeile );
    $content .= $zeile . PHP_EOL;
  }
  
  if (is_writable($filename)) 
  {
    if (!$handle = fopen($filename, 'w')) {
         print 'Can\'t open $filename';
    }
    if (!fwrite($handle, $content)) {
        print 'Can\'t write $filename';
    }
    fclose($handle);
  }  
}