PHP - Efficiency

Hello,

I hope it's ok to ask this question here. I have a registration script, but I'm not sure how to handle it efficiently and I have some questions about it. 

This is used in the page 'signup.php'. The class is called 'User'. I haven't noticed any errors or bugs. It would be very useful for me to be aware of my mistakes. 

	public function regUser($uname,$upass,$upassverify)
    {
		$new_password = password_hash($upass, PASSWORD_DEFAULT);		
		if(!password_verify($upassverify, $new_password)) {
			// passwords are not the same (I thought it would be better to do this after hashing, but maybe it doesn't matter or it's worse. I'm not sure about it) 
			$info = 'pass_err'; 
		} 
		$stmt1 = $this->db->prepare("SELECT * FROM users WHERE username=:uname");
		$stmt1->execute(array(':uname'=>$uname));

		if($stmt1->rowCount() > 0) {
			// this username has already been used 
			$info = 'user_err'; 
		}
			
		if (!$info) {
			$stmt2 = $this->db->prepare("INSERT INTO users(username,password) 
										 VALUES(:uname, :upass)");
			$stmt2->bindparam(":uname", $uname);
			$stmt2->bindparam(":upass", $new_password);            
			$stmt2->execute();
			// succesfully made an account
			$info = "success";
		}
			header("Location:/signup.php?status=".$info);
			exit();	
    }

As you might have noticed in my last post, my English is not very good, sorry about that. 

Thanks,

Fabian