updated packages

vendor/vlucas/phpdotenv/src/Environment/AbstractVariables.php

@@ -0,0 +1,84 @@
+<?php
+
+namespace Dotenv\Environment;
+
+/**
+ * This is the abstract variables implementation.
+ *
+ * Extend this as required, implementing "get", "set", and "clear".
+ */
+abstract class AbstractVariables implements VariablesInterface
+{
+    /**
+     * Are we immutable?
+     *
+     * @var bool
+     */
+    private $immutable;
+
+    /**
+     * Create a new environment variables instance.
+     *
+     * @param bool $immutable
+     *
+     * @return void
+     */
+    public function __construct($immutable)
+    {
+        $this->immutable = $immutable;
+    }
+
+    /**
+     * Determine if the environment is immutable.
+     *
+     * @return bool
+     */
+    public function isImmutable()
+    {
+        return $this->immutable;
+    }
+
+    /**
+     * Tells whether environment variable has been defined.
+     *
+     * @param string $name
+     *
+     * @return bool
+     */
+    public function has($name)
+    {
+        return is_string($name) && $this->get($name) !== null;
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function offsetExists($offset)
+    {
+        return $this->has($offset);
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function offsetGet($offset)
+    {
+        return $this->get($offset);
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function offsetSet($offset, $value)
+    {
+        $this->set($offset, $value);
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function offsetUnset($offset)
+    {
+        $this->clear($offset);
+    }
+}