CSS classes field added by the Block Class module on Block configuration form.

Block Class allows users to add classes to any block through the block's configuration interface. By adding a very short snippet of PHP to a theme's block.tpl.php file, classes can be added to the parent <div class="block ..."> element of a block. Hooray for more powerful block theming!

Installing the Drupal 7.x version

  1. Enable the module
  2. To add a class to a block, simply visit that block's configuration page at Administration > Structure > Blocks

Installing the Drupal 6.x version (6.x-1.3)

  1. Enable the module
  2. Add this snippet to your theme's block.tpl.php file (see detailed instructions below): <?php print block_class($block); ?>
  3. To add a class to a block, simply visit that block's configuration page at Administration > Site Building > Blocks

How to add the PHP snippet (7.x-2.x, 7.x-1.x, 6.x-1.3 or lower)

Here's the first line of the Garland theme's block.tpl.php prior to adding the code:

<div id="block-<?php print $block->module .'-'. $block->delta; ?>" class="clear-block block block-<?php print $block->module ?>">

And here's what the code should look like after adding the snippet:
For 7.x-2.x:

<div id="block-<?php print $block->module .'-'. $block->delta; ?>" class="clear-block block block-<?php print $block->module ?> <?php print $block->css_class; ?>">

For 7.x-1.x, 6.x-1.3 or lower:

<div id="block-<?php print $block->module .'-'. $block->delta; ?>" class="clear-block block block-<?php print $block->module ?> <?php print block_class($block); ?>">

IMPORTANT: Remember to separate the PHP snippet from the existing markup with a single space. If you don't add the space, your CSS classes could run together like this: block-modulecustomclass instead of block-module customclass.

Installing the Drupal 6.x dev version

  1. Enable the module
  2. Add this snippet to your theme's block.tpl.php file (see detailed instructions below): <?php print $block_classes; ?>
  3. To add a class to a block, simply visit that block's configuration page at Administration > Site Building > Blocks

How to add the PHP snippet (6.x-dev, 6.x-1.4 or greater)

Here's the first line of the Garland theme's block.tpl.php prior to adding the code:

<div id="block-<?php print $block->module .'-'. $block->delta; ?>" class="clear-block block block-<?php print $block->module ?>">

And here's what the code should look like after adding the snippet:

<div id="block-<?php print $block->module .'-'. $block->delta; ?>" class="clear-block block block-<?php print $block->module ?> <?php print $block_classes; ?>">

IMPORTANT: Remember to separate the PHP snippet from the existing markup with a single space. If you don't add the space, your CSS classes could run together like this: block-modulecustomclass instead of block-module customclass.

Supporting organizations: 
Creation and ongoing support and development of the module.
Development of the 7.x-2.x branch and maintenance of the module.

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