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| 1 | <?php |
| 2 | /** |
| 3 | * Pop PHP Framework (https://www.popphp.org/) |
| 4 | * |
| 5 | * @link https://github.com/popphp/popphp-framework |
| 6 | * @author Nick Sagona, III <dev@noladev.com> |
| 7 | * @copyright Copyright (c) 2009-2026 NOLA Interactive, LLC. |
| 8 | * @license https://www.popphp.org/license New BSD License |
| 9 | */ |
| 10 | |
| 11 | /** |
| 12 | * @namespace |
| 13 | */ |
| 14 | namespace Pop\Cache\Adapter; |
| 15 | |
| 16 | /** |
| 17 | * Redis cache adapter class |
| 18 | * |
| 19 | * @category Pop |
| 20 | * @package Pop\Cache |
| 21 | * @author Nick Sagona, III <dev@noladev.com> |
| 22 | * @copyright Copyright (c) 2009-2026 NOLA Interactive, LLC. |
| 23 | * @license https://www.popphp.org/license New BSD License |
| 24 | * @version 4.0.3 |
| 25 | */ |
| 26 | class Redis extends AbstractAdapter |
| 27 | { |
| 28 | |
| 29 | /** |
| 30 | * Redis object |
| 31 | * @var ?\Redis |
| 32 | */ |
| 33 | protected ?\Redis $redis = null; |
| 34 | |
| 35 | /** |
| 36 | * Constructor |
| 37 | * |
| 38 | * Instantiate the memcache cache object |
| 39 | * |
| 40 | * @param int $ttl |
| 41 | * @param string $host |
| 42 | * @param int $port |
| 43 | * @throws Exception |
| 44 | */ |
| 45 | public function __construct(int $ttl = 0, string $host = 'localhost', int $port = 6379) |
| 46 | { |
| 47 | parent::__construct($ttl); |
| 48 | if (!class_exists('Redis', false)) { |
| 49 | throw new Exception('Error: Redis is not available.'); |
| 50 | } |
| 51 | |
| 52 | $this->redis = new \Redis(); |
| 53 | if (!$this->redis->connect($host, (int)$port)) { |
| 54 | throw new Exception('Error: Unable to connect to the redis server.'); |
| 55 | } |
| 56 | } |
| 57 | |
| 58 | /** |
| 59 | * Get the redis object. |
| 60 | * |
| 61 | * @return \Redis |
| 62 | */ |
| 63 | public function redis(): \Redis |
| 64 | { |
| 65 | return $this->redis; |
| 66 | } |
| 67 | |
| 68 | /** |
| 69 | * Get the current version of redis. |
| 70 | * |
| 71 | * @return string |
| 72 | */ |
| 73 | public function getVersion(): string |
| 74 | { |
| 75 | return $this->redis->info()['redis_version']; |
| 76 | } |
| 77 | |
| 78 | /** |
| 79 | * Get the time-to-live for an item in cache |
| 80 | * |
| 81 | * @param string $id |
| 82 | * @return int |
| 83 | */ |
| 84 | public function getItemTtl(string $id): int |
| 85 | { |
| 86 | $cacheValue = $this->redis->get($id); |
| 87 | $ttl = false; |
| 88 | |
| 89 | if ($cacheValue !== false) { |
| 90 | $cacheValue = unserialize($cacheValue); |
| 91 | $ttl = $cacheValue['ttl']; |
| 92 | } |
| 93 | |
| 94 | return $ttl; |
| 95 | } |
| 96 | |
| 97 | /** |
| 98 | * Save an item to cache |
| 99 | * |
| 100 | * @param string $id |
| 101 | * @param mixed $value |
| 102 | * @param ?int $ttl |
| 103 | * @return Redis |
| 104 | */ |
| 105 | public function saveItem(string $id, mixed $value, ?int $ttl = null): Redis |
| 106 | { |
| 107 | $cacheValue = [ |
| 108 | 'start' => time(), |
| 109 | 'ttl' => ($ttl !== null) ? $ttl : $this->ttl, |
| 110 | 'value' => $value |
| 111 | ]; |
| 112 | |
| 113 | if ($cacheValue['ttl'] != 0) { |
| 114 | $this->redis->set($id, serialize($cacheValue), $cacheValue['ttl']); |
| 115 | } else { |
| 116 | $this->redis->set($id, serialize($cacheValue)); |
| 117 | } |
| 118 | return $this; |
| 119 | } |
| 120 | |
| 121 | /** |
| 122 | * Get an item from cache |
| 123 | * |
| 124 | * @param string $id |
| 125 | * @return mixed |
| 126 | */ |
| 127 | public function getItem(string $id): mixed |
| 128 | { |
| 129 | $cacheValue = $this->redis->get($id); |
| 130 | $value = false; |
| 131 | |
| 132 | if ($cacheValue !== false) { |
| 133 | $cacheValue = unserialize($cacheValue); |
| 134 | if ((($cacheValue['ttl'] == 0) || ((time() - $cacheValue['start']) <= $cacheValue['ttl']))) { |
| 135 | $value = $cacheValue['value']; |
| 136 | } else { |
| 137 | $this->deleteItem($id); |
| 138 | } |
| 139 | } else { |
| 140 | $this->deleteItem($id); |
| 141 | } |
| 142 | |
| 143 | return $value; |
| 144 | } |
| 145 | |
| 146 | /** |
| 147 | * Determine if the item exist in cache |
| 148 | * |
| 149 | * @param string $id |
| 150 | * @return bool |
| 151 | */ |
| 152 | public function hasItem(string $id): bool |
| 153 | { |
| 154 | $cacheValue = $this->getItem($id); |
| 155 | return ($cacheValue !== false); |
| 156 | } |
| 157 | |
| 158 | /** |
| 159 | * Delete a value in cache |
| 160 | * |
| 161 | * @param string $id |
| 162 | * @return Redis |
| 163 | */ |
| 164 | public function deleteItem(string $id): Redis |
| 165 | { |
| 166 | $this->redis->del($id); |
| 167 | return $this; |
| 168 | } |
| 169 | |
| 170 | /** |
| 171 | * Clear all stored values from cache |
| 172 | * |
| 173 | * @return Redis |
| 174 | */ |
| 175 | public function clear(): Redis |
| 176 | { |
| 177 | $this->redis->flushDb(); |
| 178 | return $this; |
| 179 | } |
| 180 | |
| 181 | /** |
| 182 | * Destroy cache resource |
| 183 | * |
| 184 | * @return Redis |
| 185 | */ |
| 186 | public function destroy(): Redis |
| 187 | { |
| 188 | $this->redis->flushDb(); |
| 189 | $this->redis = null; |
| 190 | return $this; |
| 191 | } |
| 192 | |
| 193 | } |