Initial commit

pma/libraries/classes/Utils/SessionCache.php

@@ -0,0 +1,58 @@
+<?php
+
+declare(strict_types=1);
+
+namespace PhpMyAdmin\Utils;
+
+final class SessionCache
+{
+    private static function key(): string
+    {
+        global $cfg, $server;
+
+        $key = 'server_' . $server;
+
+        if (isset($cfg['Server']['user'])) {
+            return $key . '_' . $cfg['Server']['user'];
+        }
+
+        return $key;
+    }
+
+    public static function has(string $name): bool
+    {
+        return isset($_SESSION['cache'][self::key()][$name]);
+    }
+
+    /**
+     * @return mixed|null
+     */
+    public static function get(string $name, ?callable $defaultValueCallback = null)
+    {
+        if (self::has($name)) {
+            return $_SESSION['cache'][self::key()][$name];
+        }
+
+        if ($defaultValueCallback !== null) {
+            $value = $defaultValueCallback();
+            self::set($name, $value);
+
+            return $value;
+        }
+
+        return null;
+    }
+
+    /**
+     * @param mixed $value
+     */
+    public static function set(string $name, $value): void
+    {
+        $_SESSION['cache'][self::key()][$name] = $value;
+    }
+
+    public static function remove(string $name): void
+    {
+        unset($_SESSION['cache'][self::key()][$name]);
+    }
+}