我可以在这个脚本中插入什么错误信息来找出问题 [英] What error messaging could I insert into this script to find out the problem
问题描述
我正在阅读 Larry Ullman 写的一本名为 PHP 5 Advanced Techniques 的书.
I'm reading a book called PHP 5 Advanced Techniques by Larry Ullman.
在第 4 章中，他向我们介绍了 PEAR.经过长时间的努力，我设法让 PEAR 与 MAMP 一起工作，并安装了此身份验证代码所需的 Auth 和 MDB2 包.但是，当我运行它时，我收到此服务器错误
In Chapter 4, he introduces us to PEAR. After a long struggle I managed to get PEAR working with MAMP and installed the Auth and MDB2 package required for this authentication code. However, when I run it, I'm getting this server errror
The website encountered an error while retrieving http://localhost:8888/phpvqp2_scripts/Ch04/login.php. It may be down for maintenance or configured incorrectly.
Here are some suggestions:
Reload this web page later.
是否有任何类型的调试可以插入到代码中以找出问题所在?我是一个新手，所以详细的说明会非常有帮助.
Is there any kind of debugging I can insert into the code to figure out what the problem is? I'm a bit of a newbie so detailed instructions would be very helpful.
<?php # Script 4.3 - login.php
/* This page uses PEAR Auth to control access.
* This assumes a database called "auth",
* accessible to a MySQL user of "root@localhost"
* with a password of "root".
* Table definition:
CREATE TABLE auth (
username VARCHAR(50) default '' NOT NULL,
password VARCHAR(32) default '' NOT NULL,
PRIMARY KEY (username),
KEY (password)
)
* MD5() is used to encrypt the passwords.
*/
// Need the PEAR class:
require_once ('Auth.php');
// Function for showing a login form:
function show_login_form() {
echo '<form method="post" action="login.php">
<p>Username <input type="text" name="username" /></p>
<p>Password <input type="password" name="password" /></p>
<input type="submit" value="Login" />
</form><br />
';
} // End of show_login_form() function.
// Connect to the database:
$options = array('dsn' => 'mysql://root:root@localhost/auth');
// Create the Auth object:
$auth = new Auth('DB', $options, 'show_login_form');
// Add a new user:
$auth->addUser('me', 'mypass');
?><!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">
<head>
<meta http-equiv="content-type" content="text/html; charset=iso-8859-1" />
<title>Restricted Page</title>
</head>
<body>
<?php
// Start the authorization:
$auth->start();
// Confirm authorization:
if ($auth->checkAuth()) {
echo '<p>You are logged in and can read this. How cool is that?</p>';
} else { // Unauthorized.
echo '<p>You must be logged in to access this page.</p>';
}
?>
</body>
</html>
推荐答案
在您的 php.ini 中启用 display_errors 以便您获得实际的错误消息.
Enable display_errors in your php.ini so you get the actual error message.
如果它仍然不起作用，请启用 log_errors 以便将脚本的错误发送到文件或系统日志.
If it still doesn't work, enable log_errors so your script's errors are sent to a file or syslog.
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