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,
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Redisplaying a Form After PHP Validation
Okay, back to form validation. So far we’ve created the HTML document validate.html, which will post through to the PHP program adduser.php, but only if JavaScript validates the fields, or if JavaScript is disabled or unavailable.
So now it’s time to create adduser.php to receive the posted form, perform its own validation, and then present the form again to the visitor if the validation fails. Example 16-3 contains the code that you should type in and save.
Example 16-3. The adduser.php program
<?php // adduser.php // Start with the PHP code $forename = $surname = $username = $password = $age = $email = ""; if (isset($_POST['forename'])) $forename = fix_string($_POST['forename']); if (isset($_POST['surname'])) $surname = fix_string($_POST['surname']); if (isset($_POST['username'])) $username = fix_string($_POST['username']); if (isset($_POST['password'])) $password = fix_string($_POST['password']); if (isset($_POST['age'])) $age = fix_string($_POST['age']); if (isset($_POST['email'])) $email = fix_string($_POST['email']); $fail = validate_forename($forename); $fail .= validate_surname($surname); $fail .= validate_username($username); $fail .= validate_password($password); $fail .= validate_age($age); $fail .= validate_email($email); echo "<html><head><title>An Example Form</title>"; if ($fail == "") { echo "</head><body>Form data successfully validated: $forename, $surname, $username, $password, $age, $email.</body></html>"; // This is where ...
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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.