Output hosts file entries for use in VirtualBox and Parallels Desktop

hosts.php

<?php
  $file = file_get_contents("/etc/hosts");
    
  $lines = explode("\n", $file);
  $hosts = array();
  
  foreach($lines as $line) {
    if (preg_match("/^#/", $line) || !$line) {
      continue;
    }
    $line = preg_replace("/((\d+\.+\d+\.*)+)\s*/", '', $line);
    $line = preg_replace("/\:\:\d\s*/", '', $line);
    $line = preg_replace("/\s*\#\s*.*/", '', $line);
    $line = preg_replace("/\t*/", '', $line);
    $hosts[] = $line;
  }
  
  $hosts = array_unique($hosts);
  sort($hosts);
  
  header('Content-Type: text/plain');
  
  echo "VirtualBox:\n-----------\n";
  foreach($hosts as $host) {
    echo "10.0.2.2 $host\n";
  }
  
  echo "\n\nParallels Desktop:\n------------------\n";
  foreach($hosts as $host) {
    echo "10.211.55.2 $host\n";
  }  
?>