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PHP with MySQL Essential Training
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Working with Apache Web Server


From:

PHP with MySQL Essential Training

with Kevin Skoglund

Video: Working with Apache Web Server

In this movie were going to learn to work with the Apache Web Server. You'll remember in the overview movie, that I told you that the Apache Web Server is already installed on Mac OS 10.8. I also want to mention that there is an alternative that you could use instead of the Apache Web Server. Starting with PHP version 5.4, there is an included Web Server. It's a very simple, lightweight web server, easy to start up, easy to stop, and not very robust. I want us to go ahead and learn to use Apache, partly because it's the most popular option out there. But also because when you finally deploy your application, you're likely to want to use Apache for serving your actual application to the general public. So let's go ahead an learn how to use it now.
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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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PHP with MySQL Essential Training
14h 24m Beginner Jun 04, 2013

Viewers: in countries Watching now:

PHP is a popular, reliable programming language at the foundation of many smart, data-driven websites. This comprehensive course from Kevin Skoglund helps developers learn the basics of PHP (including variables, logical expressions, loops, and functions), understand how to connect PHP to a MySQL database, and gain experience developing a complete web application with site navigation, form validation, and a password-protected admin area. Kevin also covers the basic CRUD routines for updating a database, debugging techniques, and usable user interfaces. Along the way, he provides practical advice, offers examples of best practices, and demonstrates refactoring techniques to improve existing code.

Topics include:
  • What is PHP?
  • Installing and configuring PHP and MySQL
  • Exploring data types
  • Controlling code with logical expressions and loops
  • Using PHP's built-in functions
  • Writing custom functions
  • Building dynamic webpages
  • Working with forms and form data
  • Using cookies and sessions to store data
  • Connecting to MySQL with PHP
  • Creating and editing database records
  • Building a content management system
  • Adding user authentication
Subjects:
Developer Servers Programming Languages Web Development
Software:
MySQL PHP
Author:
Kevin Skoglund

Working with Apache Web Server

In this movie were going to learn to work with the Apache Web Server. You'll remember in the overview movie, that I told you that the Apache Web Server is already installed on Mac OS 10.8. I also want to mention that there is an alternative that you could use instead of the Apache Web Server. Starting with PHP version 5.4, there is an included Web Server. It's a very simple, lightweight web server, easy to start up, easy to stop, and not very robust. I want us to go ahead and learn to use Apache, partly because it's the most popular option out there. But also because when you finally deploy your application, you're likely to want to use Apache for serving your actual application to the general public. So let's go ahead an learn how to use it now.

You always will have this PHP simple development one there, if you decide you want to switch over an start using that. But I don't want to use that as a crutch, an then not know how to use Apache. So let's work with Apache first. Now, even though we already have Apache installed, it doesn't mean that it's simple to get to. It's not something that sits inside your Applications folder. It's a program that runs under Unix, which is under the hood of Mac OS X. We used to be able to interact with it, from the system preferences, and from the sharing preferences, menu. But starting in 10.8, that changed because the option here that said Web Sharing was taken away by Apple. It used to be that we could just go to Web Sharing and click on the check box next to it and it would turn on Apache.

Click it again and it would turn off Apache. It was a way for us to have a graphical user interface to interact with this program that's in Unix. But they took that away, but that's okay. We don't actually need it. We can do it by going directly to units. If you go to your Applications folder, you'll see that you have a folder called Utilities. And inside there is a program called Terminal. And this is the command line utility that will allow us to interact with Mac OS X. I could just click on this and launch it, but because we're going to be using Terminal a lot, I'm going to go ahead and drag it down here to my Dock, and then launch it from there. So here we are, we just have a Command Line that will let us type commands to be sent to Unix for it to execute those commands.

And it'll come back with responses to our screen. If you've never worked with the Command Line before. Don't be intimidated by it. It's pretty easy once you get the hang of it. Now, yours likely looks different than mine. I've just simply gone up to Terminal > Preferences and customized some of my color and font settings. You can pick different things for yourself as well. I wanted something that was more easily readable by you. All right. So let's now check out Apache. The first thing you need to know about Apache is that it has a nick name. It's nickname is HTTPD. You may recognize the HTTP from when you write a URL in your browse.

That stands for the Hyper Text Transfer Protocol. The D at end stands for Daemon. A Daemon is a little program that sits waiting to respond to requests. So what is Apache? Well, it's a Hypertext Protocol Daemon. It's sitting there waiting to respond to web requests. So this is its nickname. So, httpd -v, will tell us the version that we're running. So, this lets us know that we have Apache installed and that it's version 2.2. In my case, it's .22. Now, if you have something different than that, Apache 2.3 or something later, don't worry.

It really doesn't matter what version of Apache you have. Its role in this whole process is pretty simple. It's going to take our PHP, process it, spit it out as HTML. Any features or enhancements that come in later versions of Apache aren't going to affect us. Now, incidentally, if we had said Apache -v, it comes up and says, I don't know what that command is. In this case, It is called by it's nickname. So sometimes you'll see it one way, sometimes you'll see it the other. Is Apache actually running? There are two ways that you can tell this. One is by doing a special Unix command that you don't need to know all the ins and outs of. But ps space aux and then pipe that through with that upright bar. And then after that, grep httpd.

What we're doing is we're saying spit out a list of all of the processes running on this machine. But send them to the grep search command and tell it to look for lines that have httpd in them. When I hit Return, it comes back and says oh I see one process running, and that is the grep command that you just entered, the search command. So it's not actually running. The only thing that's there was my search for it. If it was running we would have expect to find at least one other instance being returned to us. Something showing the actual process, the Daemon.

That's running and as a process waiting to respond to web requests. The other way we could do it is to launch a browser. And from the browser, we can ask for http:// and then local host. That's a special name that means go to my local IP address and tell me what you find. And it comes up and says, I'm sorry, I couldn't find anything. If Apache had been running, we would have gotten a result. So, let's go back and let's see how do we make Apache run. To do that, we're going to need to have another command. There are three commands I want us to learn and they're all very similar.

What they do is start, stop and restart Apache. And we do that with Sudo Apachectl, that's for Apache control, so we're controlling Apache, Apache control start, and Apache control stop, and then Apache control restart. The sudo at the beginning of each of those is a Unix thing. It's saying, Unix, with my highest level of access privileges, I want to execute this command. So that's what it's asking for. And once we issue any of these commands, it's going to pop up and say you know what, I need to have your password.

And that password will be the same password that you use whenever you log into your Macintosh or whenever you're installing new software. And it comes up and says hey, I need your highest level of access privileges to do this. That's the password it's talking about. Let's try it now. Okay, so here we are in the command line again. So it's sudo apachectl and then start. So it'll come up and it will ask me for my password. Now, yours may have come up and asked you with a big scary message saying, hey, be really careful about using sudo. If you're not sure what you're doing stop now.

Ignore that message. It's just a simple cautionary message that runs the first time that you run sudo. After that, you can just type your password, hit Return, and it comes up with no response. Now that also is a change, unfortunately, for the worst. It used to be that it would come up and say, Apache has now started, but they took that away, it doesn't come back and tell us anything. So, how do we know it's started? Well, we can do two things, we can issue the same command for the command line. I can use my up arrow to go back up there and just save myself some typing and then hit Return. Now, you see it came back with some more stuff.

It shows me these processes that are running. You don't have to worry about what they are or what all that means, you can see that the processes exist. We also can go to our Firefox and if we just hit reload on the page, we come back and we get something that says it works. Now, we know that Apache is working. That's a default page that Apple has. It works with the exclamation point. If you see that, Apache is running and is accessible via local host. Now on your own you can try stopping it, starting it restarting it, issue all three of those commands.

I'm not going to go ahead and that though, I think you can do those on your own. We do need to do a little bit more configuration of Apache though. And we'll do that in the next movie.

Find answers to the most frequently asked questions about PHP with MySQL Essential Training.


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Q: This course was revised on 6/4/2013. What changed?
A: The old version of this course was 6 years old and it was time for a complete revision, using PHP 5.4. (The tutorials will work with any version of PHP and covers any differences you might encounter). The author has also added updated installation instructions for Mac OS X Mountain Lion and Windows 8. The topics and end project are the same, but the code is slightly different. It also addresses frequently asked questions from the previous version.
 
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