Get and set generic properties that are not known until runtime

generic_accessors.php

<?php
class AccessibleClass {
  protected $data;

  public function __construct() {
    $this->data = array();
  }

  public function __call( $method, $args ) {
    if( 0 === ( $start = strpos($method, 'get') ) ) { // If the method is a getter
      $var = strtolower(substr($method, 3, (strlen($method) - 3)));
      if( isset($this->data[$var]) ) {
        return $this->data[$var];
      } else {
        throw new Exception(
            "Property, '$var', does not exist for class " . __CLASS__ );
      }
    } elseif( 0 === ( $start = strpos($method, 'set') ) ) { // If the method is a setter
      $var = strtolower(substr($method, 3, (strlen($method) - 3)));
      if( count($args) != 0 ) {
        $this->data[$var] = $args[0];
      } else {
        throw new Exception(
            "Could not set property, '$var', of class " . __CLASS__ . " without a value." );
      }
    } else {
      throw new Exception( "No such method exists for class " . __CLASS__ );
    }
  }
}
?>