* [ADD] PHP module checker. Work in progress

lib/SP/Core/PhpModuleChecker.php

@@ -0,0 +1,87 @@
+<?php
+/**
+ * sysPass
+ *
+ * @author    nuxsmin
+ * @link      http://syspass.org
+ * @copyright 2012-2017, Rubén Domínguez nuxsmin@$syspass.org
+ *
+ * This file is part of sysPass.
+ *
+ * sysPass is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * sysPass is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ *  along with sysPass.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+namespace SP\Core;
+
+/**
+ * Class PhpModuleChecker
+ * @package SP\Core
+ */
+class PhpModuleChecker
+{
+    const MODULES = [
+        'ldap',
+        'curl',
+        'simplexml',
+        'phar',
+        'json',
+        'xml',
+        'pdo',
+        'zlib',
+        'gettext',
+        'openssl',
+        'pcre',
+        'session',
+        'mcrypt',
+        'gd',
+        'mbstring'
+    ];
+
+    /**
+     * Missing modules
+     *
+     * @var array
+     */
+    protected $missing;
+
+    /**
+     * PhpModuleChecker constructor.
+     */
+    public function __construct()
+    {
+        $this->checkModules();
+    }
+
+    /**
+     * Check for missing modules
+     */
+    public function checkModules()
+    {
+        $loaded = get_loaded_extensions();
+
+        $this->missing = array_filter(self::MODULES, function ($module) use ($loaded) {
+            return !in_array($module, $loaded);
+        });
+    }
+
+    /**
+     * Comprobar si el módulo de LDAP está instalado.
+     *
+     * @return bool
+     */
+    public function ldapIsAvailable()
+    {
+        return extension_loaded('ldap');
+    }
+}