<?php
class AbstractPhoto {
  public $width = 260;
  public $height = 210;
  public $method = 'crop';
  public $type = 'unknown';
  public $image = 'nophoto.jpg';
  public function __construct($image) {
    $this->type = strtolower(get_class($this));
  }
}
 
class Photos extends AbstractPhoto {
  public function __construct($image) {
    parent::__construct($image);
    $this->image = $image;
  }
}
 
class Catalog extends AbstractPhoto {
}
 
class PseudoArray implements ArrayAccess  {
  private $classTable = array (false => 'Photos', true => 'Catalog');
  public function offsetGet ($offset) {
    $class = $this->classTable[strlen($offset)>0];
    return new $class($offset);
  }
  public function offsetExists ($offset) {return true;}
  public function offsetSet ($offset, $value) {}
  public function offsetUnset ($offset) {}
 }
 
 
$properties = new PseudoArray();
 
var_dump($properties['']);
 
var_dump($properties['ololo.jpg']);

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