Registry

Author: maxsite

README.md

@@ -8,6 +8,7 @@ See details on http://maxsite.org/page/php-patterns
 * "Abstract factory" (Creational)
 * "Singleton" (Creational)
 * "Multiton" (Creational)
+* "Registry" (Structural)
 
 
 (c) MaxSite.org, 2019, http://maxsite.org/

Registry/index.php

@@ -0,0 +1,122 @@
+<?php
+
+/**
+ * Pattern "Registry" (Structural)
+ * This is demo code
+ * See for details: http://maxsite.org/page/php-patterns
+ */
+
+/**
+ * Registry use Multiton
+ */
+trait MultitonTrait
+{
+private static $list;
+
+public static function getInstance(string $instance = 'default')
+{
+if (empty(self::$list[$instance])) self::$list[$instance] = new static();
+return self::$list[$instance];
+}
+
+private function __construct()
+{ 
+}
+private function __clone()
+{ 
+}
+private function __wakeup()
+{ 
+}
+}
+
+/**
+ * Class Registry
+ */
+class Registry
+{
+use MultitonTrait;
+
+private $registry = [];
+
+public function set(string $key, $val)
+{
+$this->registry[$key] = $val;
+}
+
+public function get(string $key, $default = false)
+{
+if (isset($this->registry[$key]))
+return $this->registry[$key];
+else
+return $default;
+}
+
+public function getAll()
+{
+return $this->registry;
+}
+
+public function unset(string $key)
+{
+if (isset($this->registry[$key]))
+unset($this->registry[$key]);
+}
+}
+
+/**
+ * demo
+ */
+
+echo '<pre>'; // for print in browser
+
+# $r = new Registry(); // Error: Call to private Registry::__construct()
+
+/**
+ * get instance
+ */
+$r1 = Registry::getInstance(); // "default" instance
+
+$r1->set('key', 'value');
+
+print_r($r1->get('key'));
+/**
+ value
+ */
+
+$r1->set('key1', 'value1');
+print_r($r1->get('key1'));
+/**
+ value1
+ */
+
+print_r($r1->getAll());
+/**
+Array
+(
+ [key] => value
+ [key1] => value1
+ )
+ */
+
+echo '<hr>';
+
+$r2 = Registry::getInstance('myData');
+
+print_r($r2->getAll());
+/**
+Array
+(
+)
+ */
+
+$r2->set('key22', 'value22');
+print_r($r2->getAll());
+/**
+Array
+(
+ [key22] => value22
+)
+ */
+
+# end of file