61 lines
2.3 KiB
Markdown
61 lines
2.3 KiB
Markdown
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Cache Groups {#caching.groups}
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============
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You can do more elaborate grouping by setting up `$cache_id` groups.
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This is accomplished by separating each sub-group with a vertical bar
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`|` in the `$cache_id` value. You can have as many sub-groups as you
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like.
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- You can think of cache groups like a directory hierarchy. For
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instance, a cache group of `'a|b|c'` could be thought of as the
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directory structure `'/a/b/c/'`.
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- `clearCache(null,'a|b|c')` would be like removing the files
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`'/a/b/c/*'`. `clearCache(null,'a|b')` would be like removing the
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files `'/a/b/*'`.
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- If you specify a [`$compile_id`](#variable.compile.id) such as
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`clearCache(null,'a|b','foo')` it is treated as an appended cache
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group `'/a/b/c/foo/'`.
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- If you specify a template name such as
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`clearCache('foo.tpl','a|b|c')` then Smarty will attempt to remove
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`'/a/b/c/foo.tpl'`.
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- You CANNOT remove a specified template name under multiple cache
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groups such as `'/a/b/*/foo.tpl'`, the cache grouping works
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left-to-right ONLY. You will need to group your templates under a
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single cache group hierarchy to be able to clear them as a group.
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Cache grouping should not be confused with your template directory
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hierarchy, the cache grouping has no knowledge of how your templates are
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structured. So for example, if you have a template structure like
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`themes/blue/index.tpl` and you want to be able to clear all the cache
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files for the "blue" theme, you will need to create a cache group
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structure that mimics your template file structure, such as
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`display('themes/blue/index.tpl','themes|blue')`, then clear them with
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`clearCache(null,'themes|blue')`.
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<?php
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require('Smarty.class.php');
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$smarty = new Smarty;
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$smarty->setCaching(Smarty::CACHING_LIFETIME_CURRENT);
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// clear all caches with 'sports|basketball' as the first two cache_id groups
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$smarty->clearCache(null,'sports|basketball');
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// clear all caches with "sports" as the first cache_id group. This would
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// include "sports|basketball", or "sports|(anything)|(anything)|(anything)|..."
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$smarty->clearCache(null,'sports');
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// clear the foo.tpl cache file with "sports|basketball" as the cache_id
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$smarty->clearCache('foo.tpl','sports|basketball');
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$smarty->display('index.tpl','sports|basketball');
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?>
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