code_example1.php

<?php

if ( !defined( 'BASEPATH' ) )
    exit( 'No direct script access allowed' );

/**
 * Mobbr.com
 *
 * Social nanopayment system
 *
 * @package     Kernel
 * @author      Mobbr Dev Team
 * @copyright   Copyright (c) 2011  Mobbr
 * @since       Version 1.0
 * @filesource
 */
 
namespace mobbr\core;

class url
{

  // ---------------------------------------------------------------------------

  /**
   * Make URL absolute
   *
   * @access public
   * @param string
   * @param string
   * @return string
   */
	 
  static public function absolutize_url( $rel, $base )
  {
      // -------------------------------
      // return if already absolute URL
      // -------------------------------

      $scheme = parse_url( $rel, PHP_URL_SCHEME );
      if ( !empty( $scheme) )
      {
        return $rel;
      }

      // ---------------------
      // queries and anchors
      // ---------------------

      if ( $rel[ 0 ] === '#' || $rel[ 0 ] === '?' )
      {
        return $base . $rel;
      }

      // ------------------------------------------------
      // parse base URL and convert to local variables:
      //   $scheme, $host, $path 
      // ------------------------------------------------

      $parts  = parse_url( $base );

      assert( 'empty($parts['port']) /* not yet supported */' );
      assert( 'empty($parts['user']) /* not yet supported */' );
      assert( 'empty($parts['pass']) /* not yet supported */' );

      $scheme = empty( $parts['scheme'] ) ? "" : $parts['scheme'];
      $host   = empty( $parts['host'] ) ? "" : $parts['host'];
      $path   = empty( $parts['path'] ) ? "" : $parts['path'];

      // ------------------------------------------
      // remove non-directory element from path
      // ------------------------------------------

      $path = preg_replace( '#/[^/]*$#', '', $path );

      // ------------------------------------------
      // destroy path if relative url points to root
      // ------------------------------------------

      if ( $rel[ 0 ] === '/' )
      {
        $path = '';
      }

      // ------------------------------------------
      // dirty absolute URL
      // ------------------------------------------

      $abs = "{$host}{$path}/{$rel}";

      // -------------------------------------------------
      // replace '//' or '/./' or '/foo/../' with '/' */
      // -------------------------------------------------

      $re = array( '#(/\.?/)#', '#/(?!\.\.)[^/]+/\.\./#' );
      for ( $n = 1; $n > 0; $abs = preg_replace( $re, '/', $abs, -1, $n ) );

      // ------------------------
      // absolute URL is ready!
      // ------------------------

      return "{$scheme}://{$abs}";
    }
  }
  
  // ?>