Rework constructor to allow charset modification

MysqliDb.php

@@ -92,6 +92,7 @@ class MysqliDb
     protected $password;
     protected $db;
     protected $port;
+    protected $charset;
 
     /**
      * Is Subquery object
@@ -106,24 +107,36 @@ class MysqliDb
      * @param string $db
      * @param int $port
      */
-    public function __construct($host = NULL, $username = NULL, $password = NULL, $db = NULL, $port = NULL)
+    public function __construct($host = NULL, $username = NULL, $password = NULL, $db = NULL, $port = NULL, $charset = 'utf8')
     {
-        $this->host = $host;
+        $isSubQuery = false;
+
+        // if params were passed as array
+        if (is_array ($host)) {
+            foreach ($host as $key => $val)
+                $$key = $val;
+        }
+        // if host were set as mysqli socket
+        if (is_object ($host))
+            $this->_mysqli = $host;
+        else
+            $this->host = $host;
+
         $this->username = $username;
         $this->password = $password;
         $this->db = $db;
-        if($port == NULL)
-            $this->port = ini_get ('mysqli.default_port');
-        else
-            $this->port = $port;
+        $this->port = $port;
+        $this->charset = $charset;
 
-        if ($username == null && $db == null) {
+        if ($isSubQuery) {
             $this->isSubQuery = true;
             return;
         }
 
         // for subqueries we do not need database connection and redefine root instance
-        $this->connect();
+        if (!is_object ($host))
+            $this->connect();
+
         $this->setPrefix();
         self::$_instance = $this;
     }
@@ -137,10 +150,14 @@ class MysqliDb
         if ($this->isSubQuery)
             return;
 
+        if (empty ($this->host))
+            die ('Mysql host is not set');
+
         $this->_mysqli = new mysqli ($this->host, $this->username, $this->password, $this->db, $this->port)
             or die('There was a problem connecting to the database');
 
-        $this->_mysqli->set_charset ('utf8');
+        if ($this->charset)
+            $this->_mysqli->set_charset ($this->charset);
     }
     /**
      * A method of returning the static instance to allow access to the
@@ -1044,7 +1061,7 @@ class MysqliDb
      */
     public static function subQuery($subQueryAlias = "")
     {
-        return new MysqliDb ($subQueryAlias);
+        return new MysqliDb (Array('host' => $subQueryAlias, 'isSubQuery' => true));
     }
 
     /**

readme.md

@@ -25,12 +25,29 @@ To utilize this class, first import MysqliDb.php into your project, and require
 require_once ('MysqliDb.php');
 ```
 
-After that, create a new instance of the class.
-
+Simple initialization with utf8 charset by default:
 ```php
 $db = new MysqliDb ('host', 'username', 'password', 'databaseName');
 ```
 
+Advanced initialization. If no charset should be set charset, set it to null
+```php
+$db = new Mysqlidb (Array (
+                'host' => 'host',
+                'username' => 'username', 
+                'password' => 'password',
+                'db'=> 'databaseName',
+                'port' => 3306,
+                'charset' => 'utf8'));
+```
+port and charset params are optional.
+
+Reuse already connected mysqli:
+```php
+$mysqli = new mysqli ('host', 'username', 'password', 'databaseName');
+$db = new Mysqlidb ($mysqli);
+```
+
 Its also possible to set a table prefix:
 ```php
 $db->setPrefix ('my_');

tests.php

@@ -5,6 +5,17 @@ error_reporting(E_ALL);
 $db = new Mysqlidb('localhost', 'root', '', 'testdb');
 if(!$db) die("Database error");
 
+$db = new Mysqlidb(Array (
+                'host' => 'localhost',
+                'username' => 'root', 
+                'password' => '',
+                'db'=> 'testdb',
+                'charset' => null));
+if(!$db) die("Database error");
+
+$mysqli = new mysqli ('localhost', 'root', '', 'testdb');
+$db = new Mysqlidb($mysqli);
+
 $prefix = 't_';
 $db->setPrefix($prefix);