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https://gitlab.archlinux.org/archlinux/aurweb.git
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e171f6f34e
All DB code currently uses the quickly aging mysql_* functions. These functions are strongly discouraged and may eventually be deprecated. Transition all code to utilize the PDO data access abstraction layer. PDO allows for consistent query code across multiple databases. This could potentially allow for someone to use a database other than MySQL with minimal code changes. All functions and behaviors are reproduced as faithfully as possible with PDO equivalents and some changes in code. Signed-off-by: canyonknight <canyonknight@gmail.com> Signed-off-by: Lukas Fleischer <archlinux@cryptocrack.de>
82 lines
2.5 KiB
PHP
82 lines
2.5 KiB
PHP
<?php
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if (!defined('CACHE_TYPE')) {
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define('CACHE_TYPE', 'NONE');
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}
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# Check if APC extension is loaded, and set cache prefix if it is.
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if (CACHE_TYPE == 'APC' && !defined('EXTENSION_LOADED_APC')) {
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define('EXTENSION_LOADED_APC', extension_loaded('apc'));
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define('CACHE_PREFIX', 'aur:');
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}
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# Check if memcache extension is loaded, and set cache prefix if it is.
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if (CACHE_TYPE == 'MEMCACHE' && !defined('EXTENSION_LOADED_MEMCACHE')) {
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define('EXTENSION_LOADED_MEMCACHE', extension_loaded('memcached'));
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define('CACHE_PREFIX', 'aur:');
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global $memcache;
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$memcache = new Memcached();
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$mcs = defined('MEMCACHE_SERVERS') ? MEMCACHE_SERVERS : '127.0.0.1:11211';
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foreach (explode(',', $mcs) as $elem) {
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$telem = trim($elem);
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$mcserver = explode(':', $telem);
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$memcache->addServer($mcserver[0], intval($mcserver[1]));
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}
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}
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# Set a value in the cache (currently APC) if cache is available for use. If
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# not available, this becomes effectively a no-op (return value is
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# false). Accepts an optional TTL (defaults to 600 seconds).
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function set_cache_value($key, $value, $ttl=600) {
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$status = false;
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if (defined('EXTENSION_LOADED_APC')) {
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$status = apc_store(CACHE_PREFIX.$key, $value, $ttl);
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}
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if (defined('EXTENSION_LOADED_MEMCACHE')) {
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global $memcache;
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$status = $memcache->set(CACHE_PREFIX.$key, $value, $ttl);
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}
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return $status;
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}
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# Get a value from the cache (currently APC) if cache is available for use. If
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# not available, this returns false (optionally sets passed in variable $status
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# to false, much like apc_fetch() behaves). This allows for testing the fetch
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# result appropriately even in the event that a 'false' value was the value in
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# the cache.
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function get_cache_value($key, &$status=false) {
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if(defined('EXTENSION_LOADED_APC')) {
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$ret = apc_fetch(CACHE_PREFIX.$key, $status);
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if ($status) {
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return $ret;
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}
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}
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if (defined('EXTENSION_LOADED_MEMCACHE')) {
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global $memcache;
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$ret = $memcache->get(CACHE_PREFIX.$key);
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if (!$ret) {
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$status = false;
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}
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else {
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$status = true;
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}
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return $ret;
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}
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return $status;
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}
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# Run a simple db query, retrieving and/or caching the value if APC is
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# available for use. Accepts an optional TTL value (defaults to 600 seconds).
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function db_cache_value($dbq, $dbh, $key, $ttl=600) {
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$status = false;
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$value = get_cache_value($key, $status);
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if (!$status) {
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$result = $dbh->query($dbq);
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$row = $result->fetch(PDO::FETCH_NUM);
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$value = $row[0];
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set_cache_value($key, $value, $ttl);
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}
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return $value;
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}
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?>
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