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vendor/psy/psysh/src/SystemEnv.php

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+<?php
+
+/*
+ * This file is part of Psy Shell.
+ *
+ * (c) 2012-2023 Justin Hileman
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Psy;
+
+/**
+ * Environment variables implementation via getenv().
+ */
+class SystemEnv implements EnvInterface
+{
+    /**
+     * Get an environment variable by name.
+     *
+     * @return string|null
+     */
+    public function get(string $key)
+    {
+        if (isset($_SERVER[$key]) && $_SERVER[$key]) {
+            return $_SERVER[$key];
+        }
+
+        $result = \getenv($key);
+
+        return $result === false ? null : $result;
+    }
+}