1. config.php設置
//.配置MySQL數據庫
'DB_MYSQL' => array(
'db_type'=>'mysqli',
'db_user'=>'用戶名',
'db_pwd'=>'密碼',
'db_host'=>'127.0.0.1',
'db_port'=>'3306',
'db_name'=>'數據庫名',
'db_charset'=>'utf8',
),
//.配置MongoDB數據庫
'DB_MONGO' => array(
'db_type'=>'mongo',
'db_user'=>'用戶名',
'db_pwd'=>'密碼',
'db_host'=>'localhost',
'db_port'=>'27017',
'db_name'=>'數據庫名',
),
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2. 寫一個M函數，實現數據庫的調用
//. 調用MONGO和MYSQL數據庫
protected function M( $table_name = '', $db_type = 'DB_MYSQL' ){

$db_config = C($db_type);
$db_prefix = C('DB_PREFIX');

if( $table_name == '' ){ return false; }
if( $db_type == 'DB_MYSQL' ){
return M( $table_name , $db_prefix , $db_config );
}else if( $db_type == 'DB_MONGO' ){
return M( '\Think\Model\MongoModel:' . $table_name , $db_prefix , $db_config );
}else{
return false;
}
}//;
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3. 調用M函數的實例
//. 調用自定義的M函數
//. 連接MySQL數據庫
echo 'Mysql:';
$list = $this->M('user','DB_MYSQL')->select();
dump( $list );
//. 連接MongoDB數據庫
echo 'Mongo:';
$list = $this->M('user','DB_MONGO')->select();
dump( $list );