Part 1: HTML, Meet PHP
1. PHP in action
PHP is a programming language that can do all sorts of things:
- evaluate form data sent from a browser,
- build custom web content to serve the browser
- talk to a database
- send and receive cookies (little packets of data that your browser uses to remember things)
Check out the code in the editor. Looks familiar, doesn‘t it? That‘s because a lot of it is regular old HTML! The PHP code is written in the <?php and ?> . See how it generates numbers, creates lists, and adds text directly to your webpage?
index.php
1 <!DOCTYPE html>
2 <html>
3 <head>
4 <link type=‘text/css‘ rel=‘stylesheet‘ href=‘style.css‘/>
5 <title>PHP!</title>
6 </head>
7 <body>
8 <img src="http://i1061.photobucket.com/albums/t480/ericqweinstein/php-logo_zps408c82d7.png"/>
9 <div class="header"><h1>
10 <?php
11 $welcome = "Let‘s get started with PHP!";
12 echo $welcome;
13 ?>
14 </h1></div>
15 <p><strong>Generate a list:</strong>
16 <?php
17 for ($number = 1; $number <= 10; $number++) {
18 if ($number <= 9) {
19 echo $number . ", ";
20 } else {
21 echo $number . "!";
22 }
23 }; ?>
24 </p>
25 <p><strong>Things you can do:</strong>
26 <?php
27 $things = array("Talk to databases",
28 "Send cookies", "Evaluate form data",
29 "Build dynamic webpages");
30 foreach ($things as $thing) {
31 echo "<li>$thing</li>";
32 }
33
34 unset($thing);
35 ?>
36 </p>
37 <p><strong>This jumbled sentence will change every time you click Submit!<strong></p>
38 <p>
39 <?php
40 $words = array("the ", "quick ", "brown ", "fox ",
41 "jumped ", "over ", "the ", "lazy ", "dog ");
42 shuffle($words);
43 foreach ($words as $word) {
44 echo $word;
45 };
46
47 unset($word);
48 ?>
49 </p>
50 </body>
51 </html
时间： 2024-10-18 14:02:49