Singleton: Difference between revisions

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@@ Line 398: / Line 398: @@
     // Any other methods
 }</lang>
+<lang PHP>class Singleton {
+  protected static $instance = null;
+  public $test_var;
+  private function __construct(){
+    //Any constructor code
+  }
+  public static function getInstance(){
+    if (is_null(self::$instance)){
+      self::$instance = new self();
+    }
+    return self::$instance;
+  }
+}
+$foo = Singleton::getInstance();
+$foo->test_var = 'One';
+$bar = Singleton::getInstance();
+echo $bar->test_var; //Prints 'One'
+$fail = new Singleton(); //Fatal error</lang>
 =={{header|Python}}==