PHP for Absolute Beginners

Jason Lengstorf, Thomas Blom Hansen

Language: English

Pages: 256

ISBN: 1430268158

Format: PDF / Kindle (mobi) / ePub

PHP is a server-side scripting language that enables you to develop dynamic sites that engage users in ways that are simply not possible using only HTML and CSS. PHP for Absolute Beginners takes a practical approach to teaching you how to build dynamic content for your website using PHP. You’ll quickly get started with practical PHP projects, learning how to build a dynamic image gallery. By the end of the book you’ll will have developed a personal blog complete with a password protected admin module.

PHP for Absolute Beginners won't swamp you with every detail of the full PHP language up front – instead, you’ll be introduced to a small, versatile subset of PHP and learn to use it creatively to develop dynamic web sites. In the process you will learn to use variables, control structures, functions, and objects to your advantage. You will learn how to plan and create databases and how to organize your PHP scripts beautifully. At the end of the book, you will be a confident PHP user, ready to take the next steps in creating great websites.

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verifies that the uploaded file is a JPG image a. If not, the script generates an error message b. If so, it proceeds to Step 4 4. It uses imagecreatefromjpeg() to create an image resource from the temporary file 5. It sends a content-type header to the browser, so the image is handled properly 6. It generates the image using imagejpeg() 7. It uses imagedestroy() to free the memory consumed by the image resource After the file is uploaded, the script displays the image in the browser

Simple Blog

Simple Blog Application

This code creates a valid HTML page, complete with a link to the CSS file you created earlier this chapter. It also creates a page heading (“Simple Blog Application”), a container for the entries, and a link to admin.php,

entry is associated with after the new entry is submitted. However, bear in mind that the page association won’t be saved until you make some adjustments to update.inc.php to handle this new information. Saving Page Associations Saving the page association in your database when new entries are created requires that you modify your query in update.inc.php, as well as a couple more checks to ensure that errors don’t occur. To save the entry information, you need to: 1. Make sure the page was

you’re going to build these links inside a function, rather than inline in index.php. Name your function adminLinks() and have it accept two arguments: the current page ($page) and the URL of the entry you’re working with ($url). To start, open up functions.inc.php and declare your new function just below retrieveEntries(): function adminLinks($page, $url) { // Build admin links here } The first step in your function is to build the addresses for your links. For your editing link, this address

............................................................244 Modifying index.php to Display Images........................................................................246 x ■ CONTENTS Adding a Function to Format Images for Output.....................................................246 Resizing Images ..................................................................................................................248 Determining the New Image Dimensions

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