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Internal/package-zerocore/Singleton.php

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+<?php namespace ZN;
+/**
+ * ZN PHP Web Framework
+ * 
+ * "Simplicity is the ultimate sophistication." ~ Da Vinci
+ * 
+ * @package ZN
+ * @license MIT [http://opensource.org/licenses/MIT]
+ * @author  Ozan UYKUN [ozan@znframework.com]
+ */
+
+class Singleton
+{
+    /**
+     * singleton
+     * 
+     * @var self
+     * 
+     * @return self
+     */
+    private static $singleton = NULL;
+    
+    /**
+     * singleton
+     * 
+     * 5.7.4.4|5.7.4.5|5.7.4.6[changed]
+     * 
+     * @param string $class
+     * 
+     * @return self
+     */
+    public static function class(string $class)
+    {
+        if( ! isset(self::$singleton[$class]) ) 
+        {
+            self::$singleton[$class] = self::createNewInstance($class);
+        }
+
+        return self::$singleton[$class];
+    }
+
+    /**
+     * Protected craete new instance
+     */
+    private static function createNewInstance($class)
+    {
+        if( ! class_exists($class) )
+        {
+            $classInfo = Autoloader::getClassFileInfo($class);
+
+            $class = $classInfo['namespace'] ?: $class;
+        }
+
+        return new $class;
+    }
+}