Experiment: Colored console output / fluent interface

Escape.class.php

<?php
  // Inspired by http://ku1ik.com/blog/2009/03/24/colorizing-console-output-with-rainbow-ruby-gem.html
  class Text extends Object {
    protected $string, $attr= array();
    
    public function __construct($string) {
      $this->string= $string;
    }
    
    public function toString() {
      return $this->attr 
        ? Styles::colored($this->string, implode(';', $this->attr))
        : $this->string
      ;
    }
    
    public function underlined() {
      $this->attr[]= 4;
      return $this;
    }
    
    public function colored($name) {
      static $attr= array(
        'black'   => 30,
        'red'     => 31,
        'green'   => 32,
        'yellow'  => 33,
        'blue'    => 34,
        'magenta' => 35,
        'cyan'    => 36,
        'white'   => 37
      );
      $this->attr[]= $attr[strtolower($name)];
      return $this;
    }

    public function on($name) {
      static $attr= array(
        'black'   => 40,
        'red'     => 41,
        'green'   => 42,
        'yellow'  => 43,
        'blue'    => 44,
        'magenta' => 45,
        'cyan'    => 46,
        'white'   => 47
      );
      $this->attr[]= $attr[strtolower($name)];
      return $this;
    }
  }
  
  // http://ascii-table.com/ansi-escape-sequences.php
  // http://ascii-table.com/ansi-escape-sequences-vt-100.php
  class Styles extends Object {
    
    public static function colored($text, $color) {
      return "\33[".$color.'m'.$text."\33[0m";
    }
    
    public function text($text) {
      return new Text($text);
    }
    
    public static function defaults() {
      return newinstance(__CLASS__, array(), '{
        public function warn($text) {
          return self::colored($text, "1;37;41");
        }
        public function link($text) {
          return self::colored($text, "4;1;34");
        }
      }');
    }
  }
  
  class Escape extends Object {

    public static function main(array $args) {
      with ($styled= Styles::defaults()); {
        Console::writeLine($styled->warn('Hello World'), '!');
        Console::writeLine('Not clickable: ', $styled->link('http://thekid.de/'));
        Console::writeLine($styled->text('Magic')->colored('blue')->on('yellow'));
      }
    }
  }
?>

screenshot.png

This would benefit from a __call method which would do nothing except returning the text. This way, partial styling can be applied.