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Video: Adding PHP code

Adding PHP code provides you with in-depth training on Developer. Taught by Candyce Mairs as part of the Dynamic Dreamweaver Websites: Creating Login Areas
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  1. 1m 32s
    1. Welcome
      1m 32s
  2. 2m 57s
    1. Course overview
      1m 16s
    2. The course environment
      1m 41s
  3. 26m 58s
    1. Static vs. dynamic requests
      4m 8s
    2. Installing XAMPP on a Windows system
      8m 54s
    3. Installing MAMP on a Mac system
      4m 29s
    4. Using admin consoles
      3m 54s
    5. Installing the course files
      5m 33s
  4. 18m 36s
    1. Overview of the Dreamweaver interface
      6m 22s
    2. Setting up the course site
      6m 20s
    3. Previewing pages
      5m 54s
  5. 33m 38s
    1. Creating PHP pages
      5m 45s
    2. Adding PHP code
      5m 44s
    3. Displaying variables
      4m 45s
    4. Commenting your code
      5m 30s
    5. Working with includes
      5m 58s
    6. Building the course templates
      5m 56s
  6. 35m 13s
    1. What is a database?
      5m 2s
    2. Adding database tables
      7m 34s
    3. Connecting to the database
      8m 28s
    4. Getting data from a database: Part one
      8m 25s
    5. Getting data from a database: Part two
      5m 44s
  7. 1h 16m
    1. Planning the login process
      7m 25s
    2. Creating a login form
      7m 45s
    3. Adding form validation: Part one
      9m 22s
    4. Adding form validation: Part two
      1m 37s
    5. Exploring the registration page
      7m 17s
    6. Correcting table fields
      6m 1s
    7. Setting up the login landing page
      4m 1s
    8. Using server behaviors
      3m 36s
    9. Inserting new members
      8m 48s
    10. User authentication
      10m 3s
    11. Restricting access to pages
      5m 17s
    12. Testing the login
      4m 53s
  8. 1h 6m
    1. Admin area overview
      5m 9s
    2. Adding new users
      5m 19s
    3. Restricting access
      12m 25s
    4. Planning the admin update area
      5m 19s
    5. Building the members table listing
      6m 55s
    6. Building the querystring
      9m 14s
    7. Populating the update form
      6m 33s
    8. Updating the database data
      11m 28s
    9. Testing the admin update process
      3m 47s

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Adding PHP code
Video Duration: 5m 44s4h 21m Intermediate Jun 06, 2011

Viewers: in countries Watching now:

Adding PHP code provides you with in-depth training on Developer. Taught by Candyce Mairs as part of the Dynamic Dreamweaver Websites: Creating Login Areas

View Course Description

An important but little-understood concept in dynamic web development is that of role-based logins, which allow different types of users to access different parts of the site. In this course Adobe Certified Expert Candyce Mairs shows how to use Dreamweaver's features to create role-based logins, restrict page access, build an administrator area, and test everything to make sure it works. Plus, see how to set up a development environment and work with a database from within Dreamweaver. Along the way, build your skills in areas like working with PHP, adding form validation, using server behaviors, and much more.

Topics include:
  • Installing XAMPP on a Windows system
  • Installing MAMP on a Mac system
  • Using admin consoles
  • Previewing pages
  • Working in PHP
  • Adding database tables
  • Getting data from a database
  • Building the login area
  • Planning the admin update area
  • Testing the admin update process
Developer Web video2brain
Candyce Mairs

Adding PHP code

I want to talk about the concept of a variable in a programming language. What it means and also what the limitations are for working with PHP variables in terms of what you can name them and how you reference them. PHP uses variables just like any other language does. And what is a variable? Well, we're going to go out and we're going to create a page that uses variables. So, let's create a new PHP page, we'll save this as Create Variables.

We need to give it a PHP extension. And here is our HTML page, where we're going to place our PHP code. Now, what is a variable? A variable is a place holder for information within computer memory. I like to equate it to a chest of drawers or a dresser. So, you have a dresser where you store your clothing. Imagine the front of the dresser having a name, so each drawer has its own name. When you open that dresser, you can put different things inside the dresser drawer.

But the name of the drawer is not going to change just what's inside of the drawer, that's what a variable is. It's a way to store data to be able to reference it under a single name, but that data can change overtime. Let's create a PHP variable so you can see what I'm talking about. Now PHP, we have a special tab up in the Insert bar, and this Insert bar, you can open and close through window Insert as long as it's a PHP page that's open, your PHP tab will show. And I like to use this to create the code block.

I mentioned when we were talking about the difference between PHP and HTML, that PHP resides within an HTML page. So, here is our HTML page. So, we're going to add a PHP code block between the two body tags. So, I'm going to go up to the PHP tab. I'm going to click on this icon, right in front of Echo that says, Code Block. And when I do, I get a bright red code block for PHP. And I'll go ahead and make some space between those two. This is known as the opening part of the code block. This is the closing portion and all PHP code goes in between there. So, when the PHP reads through the page for processing, what it's doing is looking for these opening and closing tags and processing whatever is inside of them.

So, how do we create a variable in PHP? What I'm going to do is put a dollar sign, and you can see as soon as I do that, these are different types of PHP variables. We're just going to create a basic, local variable. And I'm going to name it Hello. And give it the words hello. Now if you notice, as I'm typing, this turns orange and yellow. This also gets a red mark. That is PHP not working correctly.

In other words, Dreamweaver is reading my PHP and letting me know that this is not a perfect line of code. And I do know that because I'm not finished. But this is a very helpful feature. Notice as soon as I complete the line, it now says no syntax errors. But this helps you recognize if there is an error and where it's located. What line has the error. I find it to be very helpful especially if you're new to a language.

So, there is a variable called hello, so you can think of this as the name on the desk drawer. All PHP variables begin with the dollar sign, and you do have to be careful what characters you put into your variable names. I will be using all text in all of our variable names. So, there are no errors. Now, I'm going to type world, and in double quotes on the other side of the equal sign I'm going to put world.

Now, what I meant by that desk drawer or that dresser drawer, storing different information, it's that this point in time, this is what this variable means. But I could also change it to my name. I could change this one to a different value. It doesn't matter what the value is. We are always referencing that particular item by its name and that's how PHP is going to understand what we're talking about.

So, let's take a look at this page so far, we'll put it in the browser, and see what we have, which is absolutely nothing. I am so proud. (LAUGH) We will have to look at how we can display PHP coding. It looks like we did absolutely nothing because nothing is being displayed, but it's not being displayed because we did not tell PHP to display it. So, we created two variables, one called Hello and one called World. We changed the values of the variables.

Those values over here are going in double quotes, and lines within PHP require semicolon at the end.

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