59 lines
1.5 KiB
PHP
59 lines
1.5 KiB
PHP
<?php
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namespace wxopen;
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/**
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* 文件缓存实现
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*/
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class FileCache extends BaseCache
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{
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protected $cacheDir = "";
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protected $extension = ".json";
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public function __construct($cacheDir)
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{
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$this->cacheDir = rtrim($cacheDir, '/ \\') . DIRECTORY_SEPARATOR;
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if (!file_exists($this->cacheDir)) @mkdir($this->cacheDir, 0777, true);
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}
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/**
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* 缓存数据
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* @param string $cacheName 缓存名称
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* @param string $cacheValue 缓存值
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* @param int $expireIn 缓存时间，单位秒 如果为-1则为永不过期
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*/
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public function setCache($cacheName, $cacheValue, $expireIn=-1)
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{
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$filePath = $this->cacheDir . $cacheName.$this->extension;
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$arr = ['v' => $cacheValue, 'et' => time() + $expireIn - 60];
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if ($expireIn == -1) $arr['et'] = -1;
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file_put_contents($filePath, json_encode($arr));
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}
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/**
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* 获取缓存
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* @param string $cacheName
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* @return bool|string
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*/
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public function getCache($cacheName)
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{
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$filePath = $this->cacheDir . $cacheName.$this->extension;
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if (!file_exists($filePath)) return false;
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$arr = json_decode(file_get_contents($filePath), true);
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if ($arr['et'] == -1 || $arr['et'] > time()) return $arr['v'];
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return false;
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}
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/**
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* 删除缓存
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* @param string $cacheName
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*/
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public function removeCache($cacheName)
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{
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$filePath = $this->cacheDir . $cacheName.$this->extension;
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if (file_exists($filePath)) @unlink($filePath);
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}
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} |