trying to write an sql query in php [closed]

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am trying to write a simple query to fetch data from a database either using select statement or any available method to achieve that

this is what i tried

// method declaration
  public function displayVar()
  {
    $db = new sqliteAdapter('C:\Server\privatefolder\MVC\Engine\db\userinfo.db');
  SELECT  * from userinfo;  
}

this is the error i get

Parse error: syntax error, unexpected identifier "userinfo" in C:\Server\privatefolder\MVC\models\modelclass.php on line 14

i was instructed to use select statement but it isn't working (or maybe am doing it wrong) all i just want to do is write a query to fetch data from database. you can help me out with various methods/ways available to do that