Initial commit.

includes/trait-singleton.php

@@ -0,0 +1,27 @@
+<?php
+/**
+ * @package CleverOgre
+ * @subpackage OgreIssuu
+ * @version 0.1.0
+ * @since 0.1.0
+ */
+
+namespace OgreIssuu;
+
+defined('ABSPATH') || exit;
+
+trait Singleton {
+
+    private static $instances = [];
+    private static $instance_classes = [];
+    final public static function instance() {
+        $class = get_called_class();
+        if (in_array($class, self::$instance_classes)) return self::$instances[array_search($class, self::$instance_classes)];
+
+        self::$instances[] = new $class();
+        self::$instance_classes[] = $class;
+
+        return self::$instances[count(self::$instances) - 1];
+    }
+
+}