UrlParser.php

UrlParser.php

<?php

class UrlParser
{
  /**
   * The url to be parsed
   * @param String $url
   */
  public function __construct($url)
  {
    if ($this->validate($url))
    {
      $this->url = $this->parse_url($url);
    }
  }

  /**
   * Get the component of a passed URL, if none passed returns everything
   * @param  String $component options are as below
   * ['scheme', 'host', 'port', 'user', 'pass', 'path', 'query', 'tld', 'subdomains']
   * @return Array            component requested
   */
  public function get($component)
  {
    if ($component === null) {
      return $this->url;
    }

    return $this->url[$component];
  }

  /**
   * Validated passed URL
   * @param  String $url the url to validate
   * @return Boolean      true or false
   */
  private function validate($url)
  {
    if (filter_var($url, FILTER_VALIDATE_URL) === false) {
      throw new Exception("Invalid URL Provided");
    }

    return true;
  }

  /**
   * Advanced parser, added extra fields to the standard library
   * @param  String $url
   * @return Array
   */
  private function parse_url($url)
  {
    $components = parse_url($url);
    $components['subdomains'] = explode('.', $components['host']);
    $components['tld'] = array_pop($components['subdomains']);

    return $components;
  }
}

$url = new UrlParser("http://gmail.google.com");
var_dump($url->get());