January 2021
Intermediate to advanced
505 pages
9h 45m
Chinese
Content preview from PHP编程：第4版
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8
｜
第
1
章
PHP
介绍
过脚本生成
HTML
。
Web
服务器处理
PHP
的命令并将其输出（和文件中的任何
HTML
内容）
发送到浏览器。示例
1-1
显示了一个完整的
PHP
页面。
示例1-1：hello_world.php
<html>
<head>
<title>Look Out World</title>
</head>
<body>
<?php echo "Hello, world!"; ?>
</body>
</html>
将上面的内容保存到一个名为
hello_world.php
的文件中，然后使用浏览器访问它。结果
如图
1-2
所示。
图1-2：hello_world.php的输出
PHP
的
echo
命令将生成的输出插入
HTML
文件（在本例中是字符串“
Hello, world!
”）。
在这个例子中，
PHP
代码被放置在
<?php
和
?>
标记之间。还有其他方法可以标记你的
PHP
代码，请参阅第
2
章的完整描述。
配置页面
PHP
的
phpinfo()
函数创建了一个包含
PHP
的安装状况以及当前配置的全面信息的
HTML
页面。可以用它来查看你是否安装了特定扩展，或是否有已定制的
php.ini
文件。
示例
1-2
所示的是一个完整显示
phpinfo()
输出的页面。
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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.
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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.