Here is how you can customize your theme (page.tpl.php) based on a node's taxonomy. First, I created a taxonomy vocabulary called "Page Layout" and assigned to terms to it: Wide and Narrow. I set the vocabulary's hierarchy to be disabled and multiple select is disabled. I then placed this code in my page.tpl.php, but can reside in node.tpl.php (or essentially anywhere that has access to the $node global).
<?php
$vocabName = 'Page Layout';
// get vocabularies for this node
$vocabs = taxonomy_get_vocabularies($node->type);
// loop through vocablularies, look for vid that matches vocab name
foreach ($vocabs as $vocab) {
if ($vocab->name == $vocabName) {
$vid = $vocab->vid;
break;
}
}
// lookup terms for this node, by vocabularyID
$nodeTerms = taxonomy_node_get_terms_by_vocabulary($node->nid, $vid);
// loop through node terms
foreach ($nodeTerms as $nodeTerm) {
if ($nodeTerm->vid == $vid) {
$cssClass = $nodeTerm->name;
break;
}
}
?>Then, I can use the $className variable in my layout and theming. For instance...
<?php
print "<div class='$cssClass' />";
?>...or like this...
<?php
switch ($cssClass) {
case 'Wide':
// ...code...
break;
case 'Narrow':
// ...code...
break;
}
?>