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Creating a login form with a PHP server behavior

From: Dreamweaver with PHP and MySQL

Video: Creating a login form with a PHP server behavior

Web sites that allow users to manage data on the backend - such as using Insert, Update, and Delete operations - frequently need to be authenticated. Dreamweaver CS5 gives you the ability to create simple login forms and then protect your pages from unauthenticated users. For all of the exercises in this chapter, I'll use a version of the web site stored in 08_authenticate folder, under Exercise Files. If you have access to the exercise files, go into Dreamweaver site setup, and point your site at this folder.

Creating a login form with a PHP server behavior

Web sites that allow users to manage data on the backend - such as using Insert, Update, and Delete operations - frequently need to be authenticated. Dreamweaver CS5 gives you the ability to create simple login forms and then protect your pages from unauthenticated users. For all of the exercises in this chapter, I'll use a version of the web site stored in 08_authenticate folder, under Exercise Files. If you have access to the exercise files, go into Dreamweaver site setup, and point your site at this folder.

I'll start in this file, login.php, which you will find in the login folder of the site root. This file has a simple data entry form with two controls: User Name and Password. Notice that both are wrapped in Spry validation controls. I'll run the page in the browser and show you that if I try to submit the form without entering any values, I'll get client-side validation messages. In order to use the form, I would need to type in values and then compare those values to the backend database.

Right now, the data entry form doesn't do anything to work with the backend database. If you look at the code, you'll find that it's all either Cascading Style Sheets or HTML code. There is the inclusion of the Spry validation, JavaScript, and Cascading Style Sheets files, and another Cascading Style Sheet file that controls the appearance of the form, but all of the work to collect the data and compare the values to something in the backend still has to be done. I'll go back to Design View.

Before I apply the behaviors that are going to execute the login functionality, I'll first double-check my database connection. I'll go to the Databases panel and then double-click explorecalifornia. If you're working with WampServer on Windows, all these settings should be correct. If you're working with MAMP on Mac OS X, set the password to root, and then test your database. If you see this message on Windows, click OK and test again.

Once you've seen the message that the connection was made successfully, you can click OK and click OK again, and you'll be ready to work with your database. To attach the form to the backend database, go to the menu and choose Insert > Data Objects > User Authentication. There are four operations available: to Log In and Log Out User, Restrict Access To Page, and Check New Username. I'll choose Log In User.

In the dialog that appears, I indicate which form I want to get the information from on the page, and the names of the fields or data entry controls in the form. I've named my controls User Name and Password. Then I indicate how I want to do the validation. I'll select the explorecalifornia connection, and set the Table to admin. The admin table has three columns, named adminId, userName, and Password. adminId is a meaningless primary key.

I'm not going to use that. I'll set the Username column to userName and the Password column to password. Now I'm going to define what happens if the login succeeds or fails. If I load the form page directly in the browser, and the login succeeds, I'd like the user to go to the web site's homepage. So I'll click Browse, and then I'll go to my site root folder. If you are not sure whether you are in the site root folder, just click the button, Site Root. Then I'll locate and select the file index.php and click OK.

If the Login form is loaded as a result of an unsuccessful attempt to load a protected page, after the login operation is complete, I'd like to go to the originally requested page, known here as the previous URL. To do that, all I have to do is check the check box. And finally, if the login fails, I want to go back to the login form again. So I'll click Browse and then from the site root, I'll go to the login folder, and I'll choose login.php.

You can restrict access to various pages of your web site based on a user name and password. That would mean that if the user logs in at all, that they can get access to the pages. Or you can also apply access levels. I won't get into access levels here, but it's worth noting that if you want to use access levels, you need to structure your database table to include a numeric, or string value. I've selected the default User Name and Password, and now I'll click OK.

Before I test the page, let's take a look at what's in the database. I'll go to the Databases panel, to the explorecalifornia connection, and open the list of tables. Here's the table that contains the names and passwords for my users. I'll right-click on the table, and choose View data and show that the table contains only one record. The user name is explorerone, and the password is password. I'll click OK, and then I'll open the page in the external browser.

If I don't type anything in, I'll get client-side validation errors generated by the Spry controls in the form. If I type values in that aren't recognized in the database, such as noname and nopassword, and then click Submit, the client-side validation errors are cleared, but the login page is simply reloaded. But then I'll type in the valid values, explorerone as the User Name and password in all lowercase, as the password, and this time when I click Submit, I am taken to the homepage of the web site.

So the data entry form is now designed to collect the information from the user, compare it to the contents of the database, and then if the login operation succeeds, to take the user to the homepage. Once you've implemented the login form, you can then start to protect the pages of your web site one at a time, and I'll show you how to do that in another video.

Show transcript

This video is part of

Image for Dreamweaver with PHP and MySQL
Dreamweaver with PHP and MySQL

61 video lessons · 36762 viewers

David Gassner
Author

 
Expand all | Collapse all
  1. 8m 48s
    1. Welcome
      1m 25s
    2. What you should know before watching this course
      2m 17s
    3. Using the exercise files
      1m 40s
    4. Understanding the differences between Dreamweaver CS5.5 and CS6
      3m 26s
  2. 19m 31s
    1. Understanding static vs. dynamic web pages
      4m 32s
    2. Selecting application and database servers
      6m 10s
    3. Introducing Apache, MySQL, and PHP
      6m 36s
    4. Installing Apache, MySQL, and PHP
      2m 13s
  3. 39m 34s
    1. Defining a Dreamweaver site
      3m 22s
    2. Configuring a PHP testing server
      7m 48s
    3. Creating and testing a PHP-based web page
      8m 25s
    4. Adding PHP commands with the Insert panel
      3m 14s
    5. Setting and outputting simple variables
      3m 56s
    6. Testing pages with Live view and Live Code view
      2m 9s
    7. Using server-side includes
      7m 50s
    8. Navigating included pages with the Code Navigator
      2m 50s
  4. 36m 37s
    1. Using code hinting with PHP variables
      5m 31s
    2. Understanding PHP custom classes
      6m 38s
    3. Adding Zend Framework to PHP on Windows
      5m 18s
    4. Adding Zend Framework to PHP on Mac
      4m 2s
    5. Using the Site-Specific Code Hints feature
      3m 43s
    6. Using Zend Framework classes with code hints
      7m 26s
    7. Managing reusable code with the Snippets panel
      3m 59s
  5. 18m 27s
    1. Understanding relational databases
      5m 26s
    2. Creating a MySQL database in phpMyAdmin
      4m 41s
    3. Adding data in phpMyAdmin
      2m 46s
    4. Importing a completed database from a script
      5m 34s
  6. 39m 35s
    1. Defining a Dreamweaver database connection
      5m 27s
    2. Building a simple recordset
      4m 31s
    3. Building an advanced recordset
      5m 1s
    4. Displaying data with repeating regions
      6m 4s
    5. Displaying data in a dynamic table
      4m 15s
    6. Formatting dynamic data
      4m 54s
    7. Displaying the total number of records
      2m 4s
    8. Limiting records with paging controls
      4m 5s
    9. Creating conditional regions
      3m 14s
  7. 43m 12s
    1. Building a simple data entry form
      5m 27s
    2. Handling form submissions with PHP
      5m 12s
    3. Creating a customer email form
      3m 9s
    4. Validating form controls with Spry
      7m 54s
    5. Populating a list control with dynamic data
      4m 50s
    6. Working with multiple checkbox controls
      8m 5s
    7. Sending email with Zend_Mail
      8m 35s
  8. 50m 51s
    1. Using data wizards
      6m 20s
    2. Formatting dates for SQL
      5m 27s
    3. Creating a custom data entry form
      4m 50s
    4. Preparing a database table for server behaviors
      3m 3s
    5. Using the Insert Record server behavior
      5m 42s
    6. Preparing an update form
      7m 6s
    7. Using the Update Form behavior
      5m 46s
    8. Creating list page links to edit and update data
      7m 3s
    9. Using the Delete Record server behavior
      5m 34s
  9. 14m 45s
    1. Creating a login form with a PHP server behavior
      6m 29s
    2. Protecting page access with PHP server behaviors
      4m 17s
    3. Logging out with a PHP server behavior
      3m 59s
  10. 22m 50s
    1. Configuring a remote server with FTP credentials
      4m 42s
    2. Synchronizing site assets with the remote server
      5m 27s
    3. Exporting the MySQL database to a script
      3m 8s
    4. Importing the MySQL database on a remote server
      2m 24s
    5. Configuring the site for the remote database
      7m 9s
  11. 52s
    1. Final thoughts
      52s

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