Merge pull request #1389 from gitrad/master

Update requirements.php

requirements.php

@@ -48,6 +48,13 @@ $requirements = [
 		'by' => 'All <a href="http://www.yiiframework.com/doc/api/#system.db">DB-related classes</a>',
 		'memo' => 'Required for MySQL database.',
 	],
+	[
+                'name' => 'PDO PostgreSQL extension',
+                'mandatory' => false,
+                'condition' => extension_loaded('pdo_pgsql'),
+                'by' => 'All <a href="http://www.yiiframework.com/doc/api/#system.db">DB-related classes</a>',
+                'memo' => 'Required for PostgreSQL database.',
+        ],
 	// Cache :
 	[
 		'name' => 'Memcache extension',