mysql - PHP : Not able to call connection object -

i newbie in php programming. have created config , script prints mysql database information. here config :

class dbmanager{ protected $dbh; public $dbhost = '127.0.0.1'; public $dbname = 'bookstore'; public $dbuser = 'root'; public $dbpass = '';  public function getconnection(){     try{     $dbh = new pdo("mysql:host=$this->dbhost;dbname=$this->dbname", $this->dbuser,      $this->dbpass);     $dbh->setattribute(pdo::attr_errmode, pdo::errmode_exception);     return $dbh;                 }     catch(pdoexception $e){         echo "error : " . $e;     }  } 

} and, script database information :

require_once('config.php'); class showdata extends dbmanager{   public function getinfo(){     $dbh= getconnection();     $smt = $dbh->prepare("select * books");     $smt->execute();     $result = $smt->fetchall();     echo "<pre>";     print_r($result);   } } 

i getting error : fatal error: uncaught error: call undefined function getconnection(). not able make connection variable can make sql queries. have suspicions $dbh= getconnection(). making queries alright?

your getconnection in class need call $this->getconnection()

class showdata extends dbmanager{   public function getinfo(){     $dbh= $this->getconnection(); // change line     $smt = $dbh->prepare("select * books");     $smt->execute();     $result = $smt->fetchall();     echo "<pre>";     print_r($result);   } }