39 lines
839 B
PHP
39 lines
839 B
PHP
<?php
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/**
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* Cache utilities
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*/
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/**
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* Purges all cached pages
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*
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* @param string $pageCacheDir page cache directory
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*
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* @return mixed an error string if the directory is missing
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*/
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function purgeCachedPages($pageCacheDir)
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{
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if (! is_dir($pageCacheDir)) {
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$error = sprintf(t('Cannot purge %s: no directory'), $pageCacheDir);
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error_log($error);
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return $error;
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}
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array_map('unlink', glob($pageCacheDir.'/*.cache'));
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}
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/**
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* Invalidates caches when the database is changed or the user logs out.
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*
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* @param string $pageCacheDir page cache directory
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*/
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function invalidateCaches($pageCacheDir)
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{
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// Purge cache attached to session.
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if (isset($_SESSION['tags'])) {
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unset($_SESSION['tags']);
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}
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// Purge page cache shared by sessions.
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purgeCachedPages($pageCacheDir);
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}
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