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Drupal PHP for Designers or PHP Without Panicking. Ths is a basic, basic, basic intro to some key parts of PHP a designer might need when venturing into a Drupal template file.
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Drupal PHP for Designersor
Using PHP Without Panicking
Marissa MartínezGreenFerret, LLC
© 2011 GreenFerret, LLC
What Happens When We Open a Template File
• Hitchhiker’s Guide channeling– “Don’t Panic!”
• Woody (Toy Story) channeling– “It’s a perfect time to panic!”
© 2011 GreenFerret, LLC
Goal: Layout for Event Type
12
OCT
Sunday7:00 pm
- 9:00 pm
LocationElliot Bay Book Company1521 10th AveSeattle, WA
Marissa Martinez returns to Seattle to read from her new book, Headwinds. A long-time Seattle resident, Marissa was and continues as a member of Los Nortenos, a local group of Latino writers and artists
who are regular performers at Elliot Bay. This latest book is a memoir located in her current "hometown" in Massachusetts. It traces her experience as an undergraduate at MIT, but offers an inspiring story for succeeding in the face of multiple challenges.
More InformationCost: FreeWhere: Elliot Bay Book CompanyWho: Los Nortenos
Example
© 2011 GreenFerret, LLC
Questions I Wanted to Answer
• Why (Context)– Why PHP vs. HTML vs. CSS?
• What are the pieces?– What things do I need to know and understand?
• How– How do all these things fit together?
• Examples
Why
What
How
Example
© 2011 GreenFerret, LLC
We Will Not Cover
• How to create a theme• How to create a module• Object-oriented programming
© 2011 GreenFerret, LLC
HTML vs CSS vs PHP
• HTML – manage the structure/data of the page
• CSS – manages the look and feel• PHP – offers a mechanism to make
HTML dynamic via template files
Why
© 2011 GreenFerret, LLC
Let’s Make Some DivsDate block Location
Body
Map area
Additional Information
Time
Image
Date-Location Container
Image-Body Container
Example
© 2011 GreenFerret, LLC
HTML->PHP ExampleExample
Elliot Bay Book Company
<html><head></head><body>
</body></html>
<a href=“http://elliotbaybook.com”>
</a>
<div>
1521 Tenth St, Seattle, WA
</div>
<div class=“event-location”>
field_venue_linkfield_venue
field_addr1,field_city, field_state
© 2011 GreenFerret, LLC
Vocabulary Check:Drupal Concepts
• Custom content type• Theme• Template files
What
© 2011 GreenFerret, LLC
Template Files
• Filename form– Drupal 7: node--<type>.tpl.php (2 hyphens)– Drupal 6: node-<type>.tpl.php (1 hyphen)
• Example files (Drupal 7)– “Event” custom content type:
node--event.tpl.php– Theme a “page” content type for node 17:
page--node--17.tpl.php– Theme the front page:
page--front.tpl.php
What
© 2011 GreenFerret, LLC
Quick Review:Programming Concepts
• Variables• Reserved variables• Syntax• Output• Algorithm
• General, PHP, Drupal
What
© 2011 GreenFerret, LLC
Variables
• General– Definition: a name that represents a value
• PHP– Form: $variable_name
• Drupal examples:– Integer: $uid (1,2,17)– Boolean: $is_front (true, false)– Object: $node->status– Array: $field_date[value]
What
© 2011 GreenFerret, LLC
Node Template HeaderExample
© 2011 GreenFerret, LLC
Wait, There Are Some Rules
• PHP– $thisvariable ≠ $ThisVariable– Must start with letter or underscore (_)– Use only alphanumeric and underscore(_)– No spaces
• Drupal– $node->type becomes $type
$node->body becomes $body
What
© 2011 GreenFerret, LLC
Syntax
• General: The way a line of code is organized that allows it to be interpreted
• PHP– Call the PHP parser: <?php ?>– Statements end with a semicolon (;)– Operators, e.g. =, +, -, /, *, ++, --, ==, !=, &&, ||– Conditional, e.g. if, then, else, elseif, case, ?, while– Comments
$count = 17; //inline comment/* multi-line comment */
What
© 2011 GreenFerret, LLC
Controlling Output• echo vs. print
– Echo• Outputs what becomes the page html• Faster
– Print• Outputs what becomes the page html• Is a function, can be used in complex expressions
• render()– Display all values of an element– print render($content);
• hide()– hide($content[‘comments’];
What
© 2011 GreenFerret, LLC
Algorithm
• General: a list of instructions that achieve a result
What
© 2011 GreenFerret, LLC
HTML->PHP ExampleExample
Elliot Bay Book Company
<html><head></head><body>
</body></html>
<a href=“http://elliotbaybook.com”>
</a>
<div>
1521 Tenth St, Seattle, WA
</div>
<div class=“event-location”>
$field_venue_link$field_venue
$field_addr1,$field_city, $field_state
$type
© 2011 GreenFerret, LLC
Putting it Together: Build a String
• Create a div with some content-specific classes
<?php print“<div class=‘”.$type.”-location’>
<a href=‘”.$field_venue_link[‘url’] . ”’>” .$field_venue[‘value’] ?></a>
Example
© 2011 GreenFerret, LLC
Putting it Together:Conditional Output
• Only print out an address if it’s been entered
<?php if ($field_addr1[‘value’] || $field_city[‘value’] || $field_state[‘value’])
print $field_addr1[‘value’].”, ”. $field_city[‘value’].”, ”.
$field_state[‘value’] ?></div>
Example
© 2011 GreenFerret, LLC
Additional Tools
• Clear cache is your friend• Firebug (Firefox), Chrome• Development environment tool
– Benefits: color coding, syntax checking– Mac: Eclipse, WebScripter, NetBeans IDE, Komodo– PC: Eclipse, PSPad, MSFT Virtual Studio Express,
NetBeans IDE, Komodo
• codepad.org• Devel module
What
© 2011 GreenFerret, LLC
Devel Module
• Install• Modules enable• Structure Blocks, enable, set access to
admin• Develop tab in edit mode
What
© 2011 GreenFerret, LLC
Summary
• PHP leverages stored Drupal values to generate dynamic content
• Variables, syntax, and algorithms, oh my• Examples, examples, examples
© 2011 GreenFerret, LLC
Questions
© 2011 GreenFerret, LLC
Contact
• Marissa Martínez– [email protected]– 617-306-1566
• Presentationhttp://bit.ly/php4design
© 2011 GreenFerret, LLC
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