fork(8) download 
  1. <?php
  2. function get_subdomain($url) {
  3.      $segments = parse_url($url);
  4.      return current(explode('.', $segments['host'], 2));
  5.  }
  6.  
  7. echo get_subdomain('http://b...content-available-to-author-only...a.ru')."\n";
  8. echo get_subdomain('http://b...content-available-to-author-only...e.com')."\n";
  9. echo get_subdomain('http://f...content-available-to-author-only...e.com');
Success #stdin #stdout 0.01s 20520KB
comments (?)
stdin 
Standard input is empty
stdout 
blocg
blocg
forum
https://ideone.com/PgnAeL
language:
PHP (php 7.3.5)
created:
12 years ago
visibility:
public

Share or Embed source code

Discover > Sphere Engine API

The brand new service which powers Ideone!

Discover > IDE Widget

Widget for compiling and running the source code in a web browser!