August 2012
Beginner
583 pages
16h 1m
English
Content preview from Learning PHP, MySQL, JavaScript, and CSS, 2nd EditionBecome an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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.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.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.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.
Retrieving Submitted Data
Example 11-1 is only one part of the multipart form handling process. If you enter a name and click on the Submit Query button, absolutely nothing will happen other than the form being redisplayed. So, now it’s time to add some PHP code to process the data submitted by the form.
Example 11-2 expands on the previous program to include data processing. Type it in (or modify formtest.php by adding in the new lines), save it as formtest2.php, and try the program for yourself. The result of running this program and entering a name can be seen in Figure 11-2.
Example 11-2. Updated version of formtest.php
<?php // formtest2.php
if (isset($_POST['name'])) $name = $_POST['name'];
else $name = "(Not entered)";
echo <<<_END
<html>
<head>
<title>Form Test</title>
</head>
<body>
Your name is: $name<br />
<form method="post" action="formtest2.php">
What is your name?
<input type="text" name="name" />
<input type="submit" />
</form>
</body>
</html>
_END;
?>The only changes are a couple of lines at the start that check the
$_POST associative array for the field
name submitted. The previous chapter
introduced the $_POST associative
array, which contains an element for each field in an HTML form. In Example 11-2, the input name used was
name and the form method was POST, so element name of the $_POST array contains the value in $_POST['name'].
The PHP isset function is used to
test whether $_POST['name'] has been assigned a value. If nothing was posted, the program assigns the ...
Become an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
and much more.
Read now
Unlock full access
More than 5,000 organizations count on O’Reilly
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.