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Using the Update Form behavior

From: Dreamweaver with PHP and MySQL

Video: Using the Update Form behavior

Once you've prepared you data entry form, you can apply a server behavior to it, to collect the data from the form, and then update a record in the server-side database table. For this exercise, I'll use the file explorerupdate2.php in the explorers folder of the site root. This page is designed to retrieve a single record from the database table and display it in the browser. The user can make changes to the data and click Submit, and the data should then be sent to the server. There is a problem with this form, though.

Using the Update Form behavior

Once you've prepared you data entry form, you can apply a server behavior to it, to collect the data from the form, and then update a record in the server-side database table. For this exercise, I'll use the file explorerupdate2.php in the explorers folder of the site root. This page is designed to retrieve a single record from the database table and display it in the browser. The user can make changes to the data and click Submit, and the data should then be sent to the server. There is a problem with this form, though.

When I click the Submit button, I get an Invalid Format message on the date, and that's because this data entry form is designed to validate the date and look for it in the format of month/day/year. So we have to reformat that value before we present it in the form. I'll close the browser and return to Dreamweaver, and go to Code view. Now, in the previous exercise, I showed you a file that's a part of the _includes folder, named formfunctions.php.

This file has a require_once that includes the Date class from Zend framework. And then down at the bottom it has a function we're now going to use, called dbDateToFormDate. It accepts a single variable, named formDate, casts it in a Zend_Date object, and then reformats it and returns it in the form of month/day/4-digit year. I am going to use this function so I can format the value correctly. I'll use this function in my form page.

I'll go to the form and scroll all the way up to the top, I'll place the cursor after the PHP require_once command for the database connection, and I'll add another PHP code block. Within the code block I'll add a require _once function call, and I'll call the file ../_includes/formfunctions.php. So now, the two functions that are in that file, the correct version of GetSQLValueString and the function that I am going to use to format the date in the form, are both available to this page.

Now I'll go to Design View, and I'll go to the Date of Birth field. I'll click it and then go to Code View, and this helps me find the code I am looking for in the code. I'll go to fullscreen and then in order to present the date in the correct format, I'll go to the PHP command that's outputting the value in the form control. This is the expression that's being output now, the DOB column in its raw form. I am going to wrap that expression inside my custom function that's in the included file.

It looks like this. I'll start with dbdate. Then I'll press Ctrl+Spacebar and using Dreamweaver's code hinting, I'll select the correct function name, dbDateToFormDate. Then I'll place the cursor after the expression - that retrieves the data from the database - and I'll add a closing parenthesis. I should now see that there are no syntax errors in my PHP code. I'll save and run the page in the browser. And now the date is formatted as the form expects it to be and also as the function expects it to be in order to cast it to MySQL.

Now I am ready to apply the server behavior. I'll go back to Dreamweaver to Design View, and I'll look at my panels by pressing the F4 key. I'll go to Server Behaviors, I'll click the Plus button, and I'll choose Update Record. I'll check the values in the first two items. I am submitting the values from the only form in the page, explorer form, and I am using the explorecalifornia database connection. I'll pull down the list of tables and choose explorers, as before, and then I'll check all of the mappings of form controls to database table columns.

For example, the explorerId form control, the hidden control, is used to select the record to update, and all of the other table columns get their values from various controls. Dreamweaver matches this all up automatically because I have matched the names of my form controls to the names of the database columns. If you haven't matched them in the same way, you can still use the server behavior by manually matching the columns to your form controls. As with other server behaviors and wizards that I've shown in this chapter, you can also tell Dreamweaver to set up code to go back to a particular page after the update operation is done.

I'll click Browse, and I'll choose explorerlist.php and click OK. I am ready to test the Update feature. I'll save my changes, and I'll run the page, and I see that the First Name is Jackie and the Last Name is Smith. I am going to change the Last Name from Smith to Jones, and I'll change the Date of Birth from 7/10/1985 to 7/10/1981. I'll change the Email address from jackiesmith to jackiejones, and you can make other changes if you like.

I'll click Submit, and I'll see that I go back to the explorerlist page, and the Jackie Jones record has been correctly updated. So that's a look at how to prepare a data entry form for use with an update operation and how to apply the Dreamweaver update record server behavior to minimize the amount of hand coding you have to do of PHP, and also how to integrate features of the Zend framework to make it easier to format your date values.

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This video is part of

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Dreamweaver with PHP and MySQL

61 video lessons · 36357 viewers

David Gassner
Author

 
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  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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