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Using PHP in content

From: Drupal 6 Essential Training

Video: Using PHP in content

We are now going to discuss an incredibly powerful part of Drupal, the ability to use PHP code within a page's content. PHP has access to many of the inner-workings of your Drupal site allowing to essentially rewrite the site on the fly. However its power can also lead to unbelievably huge security holes and a relativity small error could make your entire site unavailable or even destroy critical information. The example we will give was taken from the drupal.org site and has been shown to be safe. The first thing that we need to do is to turn on the PHP filter module. To do so go to Administer and Modules and then scroll down until you see PHP filter, turn that on. Scroll to do the bottom and click Save Configuration. The second thing you will need to do is to turn on the Input format call PHP and make sure that the PHP evaluator is turned on within that input format. To do so go to Administer, scroll down to Input formats, click on it and go to the PHP code choice and click configure. I scroll down here and turn on the PHP evaluator just in case it's not on. Usually it will be but sometimes you might turn it off for safety, go down to the bottom and click Save Configuration.

Using PHP in content

We are now going to discuss an incredibly powerful part of Drupal, the ability to use PHP code within a page's content. PHP has access to many of the inner-workings of your Drupal site allowing to essentially rewrite the site on the fly. However its power can also lead to unbelievably huge security holes and a relativity small error could make your entire site unavailable or even destroy critical information. The example we will give was taken from the drupal.org site and has been shown to be safe. The first thing that we need to do is to turn on the PHP filter module. To do so go to Administer and Modules and then scroll down until you see PHP filter, turn that on. Scroll to do the bottom and click Save Configuration. The second thing you will need to do is to turn on the Input format call PHP and make sure that the PHP evaluator is turned on within that input format. To do so go to Administer, scroll down to Input formats, click on it and go to the PHP code choice and click configure. I scroll down here and turn on the PHP evaluator just in case it's not on. Usually it will be but sometimes you might turn it off for safety, go down to the bottom and click Save Configuration.

Now we are ready to enter PHP code, but first we need a place to enter it. I am going to create a block that I will put in the top right-hand corner showing an endorsement, explaining how wonderful it is to live underwater. To create that block, we go to Administer and Blocks and then add a new block. We will call the block Endorsements and the Block title as well will be Endorsements. If you have a Rich Text Editor, such as FCKeditor turned on, it's best to turn it off before you start playing with PHP code. You might end up entering styled HTML that could interfere with your code. But first we are just going to enter plain text, if you are a premium member of lynda.com or received this course on a disk you have an Exercise File 15_02 which includes a text document containing all of the text you are about to see.

I am going to go there now so I can copy and paste the text. For the Endorsements Block, I just copy, Command C on the Mac or Control C on a PC and paste it in there with Command V or Control V on a PC. In this case we have HTML code in here so we are going to make sure that our Input format is Full HTML, scroll to the bottom and save the block. Now we have to enable that block by bringing it into that right column and then move it up to the top. So we scroll down, there it is Endorsements; I will move it into the Right sidebar and save the block. Then in the Right sidebar once again I will bring it up to the top, scroll to the bottom and save the block, and there it is. Now we are going to turn that into dynamic content, thanks to PHP; we have three endorsements and we are going to rotate among the three.

To do so we will go back to that block and edit it, again we have the Endorsements block right here and click configure. Now I am going to go back to our example file and copy and paste the PHP code. Here's the code. I copy it, switch back to my site, erase what's there and paste it. Don't worry if you don't understand this PHP code, although of course if you are working with PHP code in your site you should know exactly what it does and how it does it. We also have to make one more change, which is to change the Input format to PHP.

We will open up this turn down triangle and click on PHP code. Then go to the bottom of the page and save the block, there. We now have a random endorsement up here, we can show that it's random by repeatedly reloading the page. Let's go Home for example, that's the same one but if we Reload, there is a different one. One more time and again there is the other one, of course you might get two of the same ones in a row because that's the way random numbers work but you can see its dynamic content. If you need help for how Drupal handles PHP code you can always get it by going to any Create content page like create Blog entry, go down to Input format and then click on the More information about formatting options. Up here it gives you information about all the HTML that shows up in Drupal and if you scroll down to the bottom, you will see all of the details on how it handles PHP code.

You can use PHP for content pretty much anywhere Drupal accepts inputs using Input formats filter, that is, wherever you are given a choice of Filtered HTML, Full HTML or PHP that includes blocks as well as the body fields of most node types. There are dozens of bits of useful and interesting PHP code on the drupal.org web site, where they are called snippets. Just be sure you remember to turn on the PHP module and PHP Input format to make them work and more importantly be extremely careful about the code you use.

Show transcript

This video is part of

Image for Drupal 6 Essential Training
Drupal 6 Essential Training

66 video lessons · 31306 viewers

Tom Geller
Author

 
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  1. 4m 38s
    1. Welcome
      50s
    2. Using the example files
      3m 48s
  2. 28m 55s
    1. Drupal is a CMS
      7m 43s
    2. Choosing Drupal
      5m 32s
    3. Checking Drupal's requirements
      4m 26s
    4. Understanding the inner workings of Drupal
      4m 35s
    5. Meeting the Drupal community
      6m 39s
  3. 11m 28s
    1. Learning key terms in Drupal
      5m 20s
    2. Touring Drupal's interface
      6m 8s
  4. 34m 35s
    1. Installing WAMP and Drupal on Windows
      9m 41s
    2. Installing MAMP
      4m 34s
    3. Setting up the database on a Mac
      2m 2s
    4. Downloading and installing Drupal on a Mac
      6m 37s
    5. Troubleshooting installation problems
      3m 49s
    6. Automating updates with cron
      7m 52s
  5. 25m 37s
    1. Setting up clean URLs
      5m 52s
    2. Backing up your Drupal site
      3m 31s
    3. Restoring your Drupal site from backup
      4m 19s
    4. Wiping your Drupal installation clean
      2m 7s
    5. Updating Drupal
      9m 48s
  6. 15m 37s
    1. Using the Administration menu
      6m 21s
    2. Setting site information
      4m 50s
    3. Setting the theme
      4m 26s
  7. 35m 8s
    1. Understanding security and permissions
      7m 2s
    2. Controlling site access with user management
      3m 39s
    3. Creating users
      7m 58s
    4. Setting user profiles
      9m 40s
    5. Creating contact forms
      6m 49s
  8. 19m 19s
    1. Creating your site's basic info pages
      7m 13s
    2. Understanding page layout
      5m 40s
    3. Creating a flexible layout with blocks
      6m 26s
  9. 15m 35s
    1. Monitoring performance
      4m 52s
    2. Recovering from disasters
      7m 37s
    3. Improving administration skills
      3m 6s
  10. 41m 3s
    1. Understanding nodes
      6m 50s
    2. Creating basic content: Stories and pages
      7m 9s
    3. Enabling other content types
      9m 22s
    4. Adding blogs
      3m 49s
    5. Adding forums
      6m 56s
    6. Adding polls
      6m 57s
  11. 34m 50s
    1. Exploring content categories
      7m 45s
    2. Exchanging content via RSS
      9m 47s
    3. Using input filters
      7m 41s
    4. Managing comments
      9m 37s
  12. 38m 5s
    1. Configuring your theme
      11m 27s
    2. Changing your theme's graphics
      4m 59s
    3. Finding and installing a new theme
      8m 56s
    4. Understanding Cascading Style Sheets (CSS)
      5m 56s
    5. Deciphering CSS files
      6m 47s
  13. 22m 41s
    1. Finding modules
      6m 53s
    2. Unpacking and installing modules
      6m 30s
    3. Configuring modules
      3m 50s
    4. Implementing complex modules
      5m 28s
  14. 32m 12s
    1. Ensuring automated updates with poormanscron
      3m 11s
    2. Defining custom content types with CCK
      12m 54s
    3. Stopping spam using a CAPTCHA
      10m 43s
    4. Using a WYSIWYG text editor
      5m 24s
  15. 22m 18s
    1. Getting around with multilevel menus
      7m 26s
    2. Building custom menus
      5m 42s
    3. Creating easy-to-navigate books
      9m 10s
  16. 20m 19s
    1. Changing page templates with PHP
      8m 15s
    2. Using PHP in content
      5m 20s
    3. Implementing PHP snippets
      6m 44s
  17. 10m 15s
    1. Launching your site
      5m 52s
    2. Joining the Drupal community
      4m 23s
  18. 14s
    1. Goodbye
      14s

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