Abcode Design 1.php

<?php 

  class ClansphereAbcode {
    # alle registered patter
    private static $patterns = array();

    public static function convert($string, $options = array()) {
      $string = self::secure($string);
      foreach(self::$patterns AS $pat => $func) {
        $string = preg_replace_callback($pat, $func, $string);
      }
      return $string;
    }

    public static function secure($string) {
      $string = htmlentities($string, ENT_QUOTES, 'UTF-8');
      return $string;
    }

    public static function register_pattern($pat, $function) {
      if(!isset(self::$patterns[$pat])) {
        if(is_string($function)) {
          if(preg_match('/return/',$function)>0)
            self::$patterns[$pat] = create_function('$match',$function);
          else
            self::$patterns[$pat] = $function;
        }
        elseif(is_object($function))   
          self::$patterns[$pat] = $function;
      }
    }

    public static function remove_pattern($pat) {
      if(isset(self::$patterns[$pat]))
        unset(self::$patterns[$pat]);
    }
  }

  # three ways to register a pattern:

  # anonymous function as string
  ClansphereAbcode::register_pattern('=\[b\](.*?)\[/b\]=si', 'return "<b>" . $match[1] . "</b>";');
  ClansphereAbcode::register_pattern('=\[u\](.*?)\[/u\]=si', 'return "<u>" . $match[1] . "</u>";');

  # anonymous function as object (php5.3?)
  ClansphereAbcode::register_pattern('=\[i\](.*?)\[/i\]=si', function($match) {return "<i>" . $match[1] . "</i>" ;});

  # function by name
  class MyClansphereAddon {
    public static function crazy($string) {
      return $string[1] . ' IS CRAZY!!';
    }
  }
  ClansphereAbcode::register_pattern('=\[cr\](.*?)\[/cr\]=si', 'MyClansphereAddon::crazy');


  # you can also remove a pattern
  ClansphereAbcode::remove_pattern('=\[b\](.*?)\[/b\]=si');

  # let's use it
  $string = '<div>[u]underlined[/u][b]bold[/b][i]italic[/i]</div>[cr]Peter[/cr]';
  $string = ClansphereAbcode::convert($string);
  echo $string;

  # output: <div>underlined[b]bold[/b]italic</div>Peter IS CRAZY!!

?>