docs: update sample code

Author: kenjis

user_guide_src/source/database/configuration/001.php

@@ -23,6 +23,7 @@ class Database extends Config
         'compress' => false,
         'strictOn' => false,
         'failover' => [],
+        'port'     => 3306,
     ];
 
     // ...

user_guide_src/source/database/configuration/002.php

@@ -1,7 +1,13 @@
 <?php
 
 // PDO
-$default['DSN'] = 'pgsql:host=localhost;port=5432;dbname=database_name';
+$default = [
+    'DSN' => 'pgsql:host=localhost;port=5432;dbname=database_name',
+    // ...
+];
 
 // Oracle
-$default['DSN'] = '//localhost/XE';
+$default = [
+    'DSN' => '//localhost/XE',
+    // ...
+];

user_guide_src/source/database/configuration/003.php

@@ -1,3 +1,6 @@
 <?php
 
-$default['DSN'] = 'DBDriver://username:password@hostname:port/database';
+$default = [
+    'DSN' => 'DBDriver://username:password@hostname:port/database',
+    // ...
+];

user_guide_src/source/database/configuration/004.php

@@ -1,6 +1,13 @@
 <?php
 
 // MySQLi
-$default['DSN'] = 'MySQLi://username:password@hostname:3306/database?charset=utf8&DBCollat=utf8_general_ci';
+$default = [
+    'DSN' => 'MySQLi://username:password@hostname:3306/database?charset=utf8&DBCollat=utf8_general_ci',
+    // ...
+];
+
 // Postgre
-$default['DSN'] = 'Postgre://username:password@hostname:5432/database?charset=utf8&connect_timeout=5&sslmode=1';
+$default = [
+    'DSN' => 'Postgre://username:password@hostname:5432/database?charset=utf8&connect_timeout=5&sslmode=1',
+    // ...
+];

user_guide_src/source/database/configuration/009.php

@@ -1,3 +1,6 @@
 <?php
 
-$default['port'] = 5432;
+$default = [
+    // ...
+    'port' => 5432,
+];