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Highlighting the current page

From: PHP with MySQL Essential Training

Video: Highlighting the current page

In the last movie, we made our navigation clickable. That is that we turned each one of the navigation items into a link and we'd click on the link. You could see that the URL would change up at the top. But, we didn't get any kind of user interface feedback in the navigation. Nothing in the navigation gave us an indication of what the currently selected page was. That's what I want us to look at in this movie, how we can go about highlighting the current page. So, the effect that I want is I want to be able to click on large widgets. And then, have some indication that I'm on the large widgets page in the navigation.

Highlighting the current page

In the last movie, we made our navigation clickable. That is that we turned each one of the navigation items into a link and we'd click on the link. You could see that the URL would change up at the top. But, we didn't get any kind of user interface feedback in the navigation. Nothing in the navigation gave us an indication of what the currently selected page was. That's what I want us to look at in this movie, how we can go about highlighting the current page. So, the effect that I want is I want to be able to click on large widgets. And then, have some indication that I'm on the large widgets page in the navigation.

This is an important aspect of site navigation, because it orients our users. It allows them to know where they are. It's almost like those big maps that they have at the mall or at the airport. That say you are here, and there's a red dot letting you know where you are. You kind of have to find that dot first, in order to orient yourself and know where you want to go from there. It's kind of the same thing. We want users to know where they're located right now. So then they'll know what other pages are available to click on besides the one that they're on right now. The way that we're going to do that is I have a style in my Style Sheets already called Selected. And all it does is turn an item's font-weight into bold. So, if something has the class selected, then its font-weight is bold. So, let's just add that then to our navigation.

Let's find the spot here in managed content for our navigation. And I could edit a lot of places, but I'm going to put it on the li tag. So, if we're on a subject that's currently selected, we want li to have class equals select it just like that, let's just try this out. I know that we're doing every single subject right now, but let's just bring it up and take a look. And you can see that not only did it make the subjects bold, it made everything that's underneath it bold too. I don't want that, so I actually need to make a little change to my style sheet.

So, I'm going to go into Public.css. In addition to saying that, it's something that's selected. I'm also going to tell UL pages, the thing that's underneath, that it ought to have font weight of normal by default. And that should fix it. That'll tell it by default, be normal weight. Don't pick up the selected style unless you have been told specifically that you are selected. Let's go back and check it out. Reload the page, and sure enough, now just our subject is selected. That's what we were looking for. Okay, so now we've got it working for all of the subjects. So now, every single subject is selected.

But that's not what we want. What we want is just the currently selected subject to have this class. How do we say, if it selected, then add the class. What we do with an if statement, right? So, we need to use PHP to make an if statement that will then add this bit of text to the HTML if the item is selected. The way I'm going to do that is I'm going to take all of this and put the whole thing in PHP to start with. So, I'm just going to put quotes around it all and we'll open PHP tags. I'm also going to echo, semicolon at the end, there we go.

So now, I've brought into PHP. Notice that I've got double quotes opening it, and I'm using double quotes inside of it. So, I need to actually escape those double quotes. Anytime you use double quotes inside, you have to let it know that that's not the ending double quote. That's just a double quote that's inside. So now, the end result is exactly the same as what I had before. All I've done is take what was an HTML and put it into PHP instead. We're actually going to take this and break it up now into three parts. We're going to have the opening li, the closing of the li.

And in between will be this bit that I want to add, conditionally. So, I'm just going to put double quotes here, and I'll end that statement. And let's make a new one here, echo. Drop this down so they're kind of parallel. And then right here, right before that closing HTML bracket, I'm going to add another one. Make sure you've got all your semicolons. So now, li class selected, and then close the li tack. Still, the exact same thing that I had before, all I've done is break it up onto three lines. The output would be absolutely identical to what I had at the start. But, now I'm in a position where I can take this second line and I can put in a conditional.

So, if something is true, then echo class selected. If it's not true, then we'll just get the li tag. We'll have less than li greater than. That's it. So now, we need to write out conditional. So, when do we want to display it? We want to display it when the current subject ID as we're looping through, is equal to the selected subject ID. So, there's our current subject ID. We'll just grab that, and paste it up here. When that's equal to our selected subject ID from up there.

There we go. When those are equal, then market is being class selected. Let's go over and try that out. Save it. Let's reload our page. Now, we got to click on a subject About Widget Corp. Look at that, it stayed bold. Products stayed bold. Services, Today's Widget Trivia. These all stayed bold. Now, it doesn't do it for the pages though, just for the subjects. We have to do the same code. I'm just going to copy this. Let's jump down here to this li. We'll paste it in. But instead of subject ID, we're working with page.

In both cases, but the class is still the same, it's still selected. Now, let's go back and reload our page. Retrofitting stays selected, services, small widgets. Now we have that user interface feedback we're looking for. Our navigation now is responsive to our users, and it feels responsive. The user will feel like they're making a change and they can see that change happen right in front of them. It's a very reassuring feeling. Now that we've solved this problem, I want us to do a little bit more refactoring of the navigation.

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This video is part of

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

131 video lessons · 33436 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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