php类速成课程

Question

我正在疯狂尝试编写我的第一个php类; 它应该连接到服务器和数据库,但我总是收到此错误:

Parse error: syntax error, unexpected ',', expecting T_PAAMAYIM_NEKUDOTAYIM in /Applications/XAMPP/xamppfiles/htdocs/classTest/test.php on line 9

在此先感谢,这是代码:

<?php
// include 'DBConnect.php';

class DBConnect
{

function connection($hostname = "localhost", $myname = "root", $pass = ''){

         mysql_connect(&hostname, &myname, &pass) or die("Could not connect!"); //Connect to mysql
         }

function choose($dbnam){
         mysql_select_db(&dbnam) or die("Couldn't find database!"); //fnd specific db
         }

}


 $a = new DBConnect();


$connect = $a->connection("localhost", "root");

$a->choose('mydb');

 ?>

Answer 1

你错过了班级中所有变量的$.第9行应该如下所示:

mysql_connect(&$hostname, &$myname, &$pass) or die("Could not connect!")

另外,我不知道为什么你在这里通过参考(使用&符号),似乎没必要.