January 2021
Intermediate to advanced
505 pages
9h 45m
Chinese
Content preview from PHP编程：第4版
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设置响应标头
｜
205
验证邮件地址是很重要的任务。没有方法可以验证一个字符串是否是一个有效的邮件地
址。然而，可以要求用户输入两遍邮件地址（两个字段）防止打字错误，还可以阻止用
户输入不是在
@
后面某处有一个句点的格式，比如
me
或
me@aol
，并且额外检查不想
将邮件发送到的域名（例如，
white***.gov
或竞争对手的网站）。例如
：
$email1 = strtolower($_POST['email1']);
$email2 = strtolower($_POST['email2']);
if ($email1 !== $email2) {
die("The email addresses didn't match");
}
if (!preg_match('/@.+\..+$/', $email1)) {
die("The email address is malformed");
}
if (strpos($email1, "white***.gov")) {
die("I will not send mail to there");
}
字段验证是基本的字符串操作。在这个例子中，我们用了正则表达式和字符串函数来确
保字符串是我们期望用户输入的。
设置响应标头
如我们讨论过的，服务器发回客户端的
HTTP
响应包含定义正文内容类型的标头、服务
器发送的响应的正文有多少字节、响应什么时候被发回的等。
PHP
和
Apache
可以为你
设置标头信息 ：定义文件为
HTML
，计算
HTML
页面的长度等。很多网页应用程序都不 ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.