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Commenting your code

From: Dynamic Dreamweaver Websites: Creating Login Areas

Video: Commenting your code

When you start to make the transition from static pages into dynamic pages, you begin to work in more programming type environments. And in a programming environment, unlike in a standard HTML environment it's very important to add comments to your code. If you come back in and let's say there is a five page process, that's creating a single page for your user, you do not want to have to go through all five pages to figure out what all the coding does in order to make a change to that page. Or one of the pages in that process moving forward so its important to have each piece of code commented so when you go into it later, you don't have to figure out the entire page concept you can focus on the code block that actually does what you need to change.

Commenting your code

When you start to make the transition from static pages into dynamic pages, you begin to work in more programming type environments. And in a programming environment, unlike in a standard HTML environment it's very important to add comments to your code. If you come back in and let's say there is a five page process, that's creating a single page for your user, you do not want to have to go through all five pages to figure out what all the coding does in order to make a change to that page. Or one of the pages in that process moving forward so its important to have each piece of code commented so when you go into it later, you don't have to figure out the entire page concept you can focus on the code block that actually does what you need to change.

So I'll show you not just how to comment in PHP but also how to work with the commenting features. Within dream weaver. Now I want to add a comment above this line and no this code is not difficult I can easily read it and see what it does. But the concept of adding comments to every code block is a good one to get in the habit of doing, and whenever I do my courses we don't have time to plug comments in as we're working through the course.

So it's something I try and stress at the beginning when you're working on your own always add comments.immediately. If you say you're going to go back in and comment later it just never happens. The other piece I do with comments is, especially if I'm working with client's pages. I will not only comment out what the code does but if there's a particular person who approved it, or a particular date. I will add that into my comments as well. So let's add a PHP comment. And what I'm going to say is this displays our Hello World variables. Now I'm going to take that area there inside the code block, copy it, and I'm going to move it outside the code block as well. So we have it listed with in the PHPs, we also have it listed outside of it. This one above the PHPs needs to be an HTML comment. So I will move over the Commenting tool bar.

I should say the Coding tool bar has a commenting area. And it's this little area that looks like somebody's speaking. And if I click on that there are a few different types of comments available. Since this one we want to be an HTML comment I will apply an HTML comment to that one. Now, it did move the lower part of this comment down to the next page, you can drag and drop in Dreamweaver, so I'll just drag it to the other side just to keep it neat.

Now PHP is not happy with this information, because PHP does not understand it. So I will select that line, and there are two different ways to comment in PHP within Dreamweaver that is; I can click this area, just to the right of echo, and if I do that, I get this type of PHP comment. There are a couple of other ways you can comment in PHP as well. But not to confuse the issue, I'll show you how to remove a comment.

And that's the one with the red X, that gets rid of a comment that might be there. The other type of PHP comment is this middle one here apply comment. You can see it now turns orange so PHP comments are orange HTML comments are gray. Let's put this in the browser and show you the difference. So I have my Hello World being displayed, and if I go to view page source, or view source, depending upon the browser you're in.

Notice this line right under the body tag, with the HTML comments, is showing in the browser. What is not showing is any of this PHP piece other than the values for our variables. So the only thing showing is what's inside those double quotes. PHP has taken our variable declarations, it has converted it into values and Hello World is being displayed. PHP also strips out any PHP comments and the code block says well. So none of this PHP coding is going to show in the browser. That's why you as a user cannot go into a browser and view source to see any silverside language features or coding.

It's strict out by the silverside language before it sent to the browser. So that is adding comments in PHP, very important concept. I'm afraid I don't have time to stress that with the topics we're going to cover in the amount of time we have. But please try and get into the habit of commenting your code, you'll be very happy you did moving forward.

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This video is part of

Image for Dynamic Dreamweaver Websites: Creating Login Areas
Dynamic Dreamweaver Websites: Creating Login Areas

43 video lessons · 1610 viewers

Candyce Mairs
Author

 
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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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