PHP:字符串在外部文件中不起作用

Question

我已经在外部文件中编写了一些字符串，因此我没有到处都有字符串，但它似乎不起作用。

Init.inc.php

$get_user = mysql_query("SELECT * FROM users WHERE username = '".$_SESSION['user']."'");
$user_data = mysql_fetch_array($get_user);
$userid = mysql_real_escape_string($user_data['id']);
$username = mysql_real_escape_string($user_data['username']);
$email = mysql_real_escape_string($user_data['email']);

Session.php

require("includes/config.php");
require("includes/init.inc.php");
echo "Hello", $username, $email;

它应该输出用户的用户名和电子邮件地址。预先感谢:)

Answer 1

如果您定义为 GLOBAL 则有效

require("includes/config.php");
require("includes/init.inc.php");
global $username, $email;
echo "Hello", $username, $email;