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PHP Registry Pattern Step By Step Tutorial - Part 1: Actually, we involve many parameters. We put in and out parameters in many method. It will raise what we name "tramp data". To make everything clear, we can implement Registry pattern.

Following sample to store and get parameters.

<?php
class CarRegistry{
  var $_store = array();
    
  function set($key, $obj){
    $this->_store[$key] = $obj;
  }
  
  function get($key){
    if(array_key_exists($key, $this->_store)){
		return $this->_store[$key];
	}
  }
  
  function &getInstance(){
    static $instance = array();
	if (!$instance){
	  $instance[0] =& new CarRegistry;
	  return $instance[0];
	}
  }
}

// TEST IT
$reg =& CarRegistry::getInstance();

$key = 'honda';
$value = array('Jazz', 'Stream');
$reg->set($key,$value);

$key = 'nissan';
$value = array('Teranno', 'Livina');
$reg->set($key,$value);

echo "Honda: ".implode(", ",$reg->get('honda'));
echo "</br>";
echo "Nissan: ".implode(", ",$reg->get('nissan'));

// OUTPUT
// Honda: Jazz, Stream
// Nissan: Teranno, Livina
?>

set(for input/store parameters) and get(for retrieve parameters) are common name used registry pattern.

mmm... we can combine with Singleton pattern for above.