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Assignment results: Pages CRUD

From: PHP with MySQL Essential Training

Video: Assignment results: Pages CRUD

So how did you do with your first big assignment? Hopefully you were successful and you were able to create pages CRUD, that's similar to what we did with the subjects CRUD. Now for any reason, you ran into any problems or you just want to compare notes. All of the code for this is in the exercise files. And I'm going to show it to you now. And if you want to you can pause the movie to see how I did something. Copy it down and get it working for yourself. I only made changes to four files and those are the same four files that I mentioned in the last movie. The first of those is manage content.php and I made two changes. I made one in the manage subject area.

Assignment results: Pages CRUD

So how did you do with your first big assignment? Hopefully you were successful and you were able to create pages CRUD, that's similar to what we did with the subjects CRUD. Now for any reason, you ran into any problems or you just want to compare notes. All of the code for this is in the exercise files. And I'm going to show it to you now. And if you want to you can pause the movie to see how I did something. Copy it down and get it working for yourself. I only made changes to four files and those are the same four files that I mentioned in the last movie. The first of those is manage content.php and I made two changes. I made one in the manage subject area.

I added a new section where we list off the pages that are in this subject. So do that. It's pretty simple. I used my function that I already had called find pages for subject to get a set of subject pages. And then went through each page in that set. And outputted an li tag. And inside that put a link that would just take me to view that page. Notice that I used URL encoded HTML entities on each one of those. Then underneath that I've got an area where I have a new page link. So new_page.php, and very important, notice that I'm sending with that page the subject ID.

Subject equals and then you only encoding the current subject ID. Now you can call this something else if you want to call ID. Doesn't really matter what you call it but it is very important that you send it because when we create a new page, we can't just create it in isolation. We need to know what page does this subject belong to. And since this is a get request, the only way to do that is to send it in the URL string. I made another change to the page, which is down here on the manage page section. You'll see that I just added a link for editpage.php.

This time I just sent the page that I want to edit. I don't need to send the subject this time because I can deduce that. Once I find the page in the database, I'll know what its subject ID is, it's stored in the table along with it. So that will allow me to edit the page. Alright, so now let's go take a look at the newpage.php. The new page.php, this is very similar to what we did for newsubject.php but that was a two step process before. We had a page that presented the form and a page that processed the form. This is single page submission.

So I took those two pages from before and folded them together to make a single page for creation. And then made the edits that I needed as well. So we make sure that we have a current subject. We make sure that we were able to find a selected page and get the current subject. Because I used subject equals as the query string parameter, I was able to use find selected page because it uses that automatically. So that was nice, it let me do that. And if I don't have a current subject? Well then we'd go to another page. If the form has been submitted, then of course we're going to process the form. I'll just fold that up and see that below that is where we display the form. So let's just take a look at the form first.

It's pretty straightforward. It's what you would expect for creating our page. It's almost identical to what we had for creating our subject with just a couple of small differences. One is of course we have our content area. So that's what I put for the content area, just put a br tag in front of it followed by text area, name content and I gave it rows 20 columns 80 with nothing inside of it. And I also changed my cancel link slightly, so that it'll take me back to that same subject page that I was just on if I decide not to create a new page after all.

The other change I had to make was in the code for position because with the subjects we were finding all subjects. But here I want to find just pages for this subject. So you'll just want to be careful about that. Okay, so that's the form. Let's go up and look at the submission. So I added content to my required fields. I did not give it a max_length. I said it could be as long as it wants. That's fine but it does have to have something. And then notice that when I go to do my creation, I make sure that I have a subject_id, very important, we need that subject_id to create it.

Because that's going to be something we're going to submit now as a value to our table. We need to store the subject_id. In addition I have content and I escape it because it's a string. So we want to make sure that we escape it from MYSQL and I have my mysql_prep function that does that for me. Notice that I put single quotes around the content but I don't put single quotes around subject ID. Because this is going to be an integer and this is going to be a string. And then once it's done, it redirects based on success or failure and has a message that it stores in the session, just like we did before.

So that's it for new page. I'll show you now edit page. Very similar to what we did for editing a subject. If it's been submitted, we do this action otherwise we have the form down here. The form is almost identical to what we were just working with, finding pages for subject. Make sure that page count for editing a page is the exact number of pages that are existing. Whereas when we're creating a new page we add one to that value. If you'll remember we did that with subjects too. And then, of course, now that I have my content, I actually have content displayed.

So I want to make sure that I use HTML entities when I echo that back out into the text area. Alright, let's look at the submission. So here's the actual processing of the form. I don't need to worry about the subject ID this time because I'm not editing it. That's not something that I've decided to make editable. You can't change what subject something belongs to. So I don't even worry about it here. But I do worry about the other values including content. And I make sure that I prep that value and add it to my required fields. And then when I actually do the update, you want to make sure that you add it here as well.

You have to be careful about adding things like commas at the end of one line whenever you add a new line. Otherwise you'll get an error there. And then last of all is delete page.php. Of course, we want to make sure that we have a page. So it checks to make sure that the page is there. And then, of course, it just does a simple deletion. It doesn't matter what the subject was. It doesn't care what the subject was. It's just going to delete the page and send us back to the managedcontent.php page. So that's it. That's all there was to it. It's just those four pages. So if you need to go back and make edits to your own. When you feel like you've got it all working.

Then we're going to be ready to move on to the next chapter.

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This video is part of

Image for PHP with MySQL Essential Training
PHP with MySQL Essential Training

131 video lessons · 32795 viewers

Kevin Skoglund
Author

 
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  1. 4m 8s
    1. Welcome
      1m 0s
    2. Using the exercise files
      3m 8s
  2. 15m 6s
    1. What is PHP?
      3m 52s
    2. The history of PHP
      2m 51s
    3. Why choose PHP?
      4m 10s
    4. Installation overview
      4m 13s
  3. 54m 53s
    1. Overview
      2m 33s
    2. Working with Apache Web Server
      6m 56s
    3. Changing the document root
      7m 24s
    4. Enabling PHP
      6m 16s
    5. Upgrading PHP
      3m 30s
    6. Configuring PHP
      10m 3s
    7. Installing MySQL
      5m 46s
    8. Configuring MySQL
      7m 24s
    9. Text editor
      5m 1s
  4. 31m 25s
    1. Overview
      3m 27s
    2. Installing WampServer
      5m 46s
    3. Finding the document root
      2m 24s
    4. Configuring PHP
      8m 12s
    5. Configuring MySQL
      5m 45s
    6. Text editor
      5m 51s
  5. 19m 12s
    1. Embedding PHP code on a page
      6m 43s
    2. Outputting dynamic text
      5m 55s
    3. The operational trail
      2m 27s
    4. Inserting code comments
      4m 7s
  6. 1h 18m
    1. Variables
      7m 50s
    2. Strings
      4m 38s
    3. String functions
      8m 54s
    4. Numbers part one: Integers
      6m 27s
    5. Numbers part two: Floating points
      5m 25s
    6. Arrays
      10m 0s
    7. Associative arrays
      6m 37s
    8. Array functions
      6m 33s
    9. Booleans
      3m 50s
    10. NULL and empty
      5m 15s
    11. Type juggling and casting
      8m 27s
    12. Constants
      4m 43s
  7. 27m 37s
    1. If statements
      6m 0s
    2. Else and elseif statements
      4m 16s
    3. Logical operators
      7m 30s
    4. Switch statements
      9m 51s
  8. 42m 15s
    1. While loops
      8m 41s
    2. For loops
      5m 59s
    3. Foreach loops
      8m 16s
    4. Continue
      8m 28s
    5. Break
      4m 8s
    6. Understanding array pointers
      6m 43s
  9. 37m 25s
    1. Defining functions
      8m 25s
    2. Function arguments
      5m 32s
    3. Returning values from a function
      7m 33s
    4. Multiple return values
      4m 53s
    5. Scope and global variables
      6m 2s
    6. Setting default argument values
      5m 0s
  10. 20m 18s
    1. Common problems
      3m 47s
    2. Warnings and errors
      8m 36s
    3. Debugging and troubleshooting
      7m 55s
  11. 57m 57s
    1. Links and URLs
      5m 33s
    2. Using GET values
      5m 35s
    3. Encoding GET values
      8m 41s
    4. Encoding for HTML
      9m 26s
    5. Including and requiring files
      7m 40s
    6. Modifying headers
      6m 45s
    7. Page redirection
      6m 43s
    8. Output buffering
      7m 34s
  12. 1h 3m
    1. Building forms
      7m 28s
    2. Detecting form submissions
      5m 59s
    3. Single-page form processing
      7m 57s
    4. Validating form values
      10m 40s
    5. Problems with validation logic
      9m 54s
    6. Displaying validation errors
      7m 23s
    7. Custom validation functions
      6m 28s
    8. Single-page form with validations
      7m 25s
  13. 28m 5s
    1. Working with cookies
      2m 49s
    2. Setting cookie values
      5m 55s
    3. Reading cookie values
      6m 1s
    4. Unsetting cookie values
      4m 51s
    5. Working with sessions
      8m 29s
  14. 48m 39s
    1. MySQL introduction
      6m 43s
    2. Creating a database
      7m 41s
    3. Creating a database table
      7m 42s
    4. CRUD in MySQL
      5m 48s
    5. Populating a MySQL database
      7m 32s
    6. Relational database tables
      6m 40s
    7. Populating the relational table
      6m 33s
  15. 56m 4s
    1. Database APIs in PHP
      4m 51s
    2. Connecting to MySQL with PHP
      7m 45s
    3. Retrieving data from MySQL
      8m 47s
    4. Working with retrieved data
      6m 12s
    5. Creating records with PHP
      6m 58s
    6. Updating and deleting records with PHP
      9m 6s
    7. SQL injection
      3m 5s
    8. Escaping strings for MySQL
      6m 45s
    9. Introducing prepared statements
      2m 35s
  16. 35m 58s
    1. Blueprinting the application
      7m 19s
    2. Building the CMS database
      5m 14s
    3. Establishing your work area
      4m 38s
    4. Creating and styling the first page
      4m 22s
    5. Making page assets reusable
      6m 36s
    6. Connecting the application to the database
      7m 49s
  17. 32m 49s
    1. Adding pages to the navigation subjects
      5m 58s
    2. Refactoring the navigation
      6m 7s
    3. Selecting pages from the navigation
      6m 2s
    4. Highlighting the current page
      5m 26s
    5. Moving the navigation to a function
      9m 16s
  18. 1h 45m
    1. Finding a subject in the database
      9m 48s
    2. Refactoring the page selection
      10m 52s
    3. Creating a new subject form
      6m 55s
    4. Processing form values and adding subjects
      11m 20s
    5. Passing data in the session
      9m 16s
    6. Validating form values
      9m 40s
    7. Creating an edit subject form
      8m 30s
    8. Using single-page submission
      7m 44s
    9. Deleting a subject
      9m 44s
    10. Cleaning up
      10m 37s
    11. Assignment: Pages CRUD
      4m 30s
    12. Assignment results: Pages CRUD
      6m 10s
  19. 39m 26s
    1. The public appearance
      8m 52s
    2. Using a context for conditional code
      11m 37s
    3. Adding a default subject behavior
      6m 9s
    4. The public content area
      5m 51s
    5. Protecting page visibility
      6m 57s
  20. 1h 3m
    1. User authentication overview
      4m 3s
    2. Admin CRUD
      8m 41s
    3. Encrypting passwords
      7m 26s
    4. Salting passwords
      5m 42s
    5. Adding password encryption to CMS
      11m 54s
    6. New PHP password functions
      3m 13s
    7. Creating a login system
      11m 28s
    8. Checking for authorization
      5m 48s
    9. Creating a logout page
      5m 40s
  21. 2m 4s
    1. Next steps
      2m 4s

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