PDO Try Catch

try_catch.php

try {	
	$dbh->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
	// Add PDO query below here.

        if($sth->execute()){
            $arr = $sth->errorInfo();
            print_r($arr);
        }

} 
catch (PDOException $e) {
	echo  $e->getMessage();
}