文件缓存类,增加前缀清理功能-PHP源码
php代码
options = $options;
}
$this->options['temp'] = !empty($options['temp']) ? $options['temp'] : C('DATA_CACHE_PATH');
$this->options['prefix'] = isset($options['prefix']) ? $options['prefix'] : C('DATA_CACHE_PREFIX');
$this->options['expire'] = isset($options['expire']) ? $options['expire'] : C('DATA_CACHE_TIME');
$this->options['length'] = isset($options['length']) ? $options['length'] : 0;
$this->options['temp'] = rtrim($this->options['temp'], '\\/') . DIRECTORY_SEPARATOR;
$this->init();
}
/**
* 初始化检查
* @access private
* @return boolean
*/
private function init() {
// 创建应用缓存目录
if (!is_dir($this->options['temp'])) {
mkdir($this->options['temp']);
}
}
/**
* 取得变量的存储文件名
* @access private
* @param string $name 缓存变量名
* @return string
*/
private function filename($name) {
$name = md5(C('DATA_CACHE_KEY') . $name);
if (C('DATA_CACHE_SUBDIR')) {
// 使用子目录
$dir = '';
for ($i = 0; $i < C('DATA_PATH_LEVEL'); $i++) {
$dir .= $name{$i} . DIRECTORY_SEPARATOR;
}
if (!is_dir($this->options['temp'] . $dir)) {
mkdir($this->options['temp'] . $dir, 0755, true);
}
$filename = $dir . $this->options['prefix'] . $name . '.tmp';
} else {
$filename = $this->options['prefix'] . $name . '.tmp';
}
return $this->options['temp'] . $filename;
}
/**
* 读取缓存
* @access public
* @param string $name 缓存变量名
* @return mixed
*/
public function get($name) {
$filename = $this->filename($name);
if (!is_file($filename)) {
return false;
}
N('cache_read', 1);
$content = file_get_contents($filename);
if (false !== $content) {
$expire = (int) substr($content, 8, 12);
if ($expire != 0 && time() > filemtime($filename) + $expire) {
//缓存过期删除缓存文件
unlink($filename);
return false;
}
if (C('DATA_CACHE_CHECK')) {//开启数据校验
$check = substr($content, 20, 32);
$content = substr($content, 52);
if ($check != md5($content)) {//校验错误
return false;
}
} else {
$content = substr($content, 20);
}
if (C('DATA_CACHE_COMPRESS') && function_exists('gzcompress')) {
//启用数据压缩
$content = gzuncompress($content);
}
$content = unserialize($content);
return $content;
} else {
return false;
}
}
/**
* 写入缓存
* @access public
* @param string $name 缓存变量名
* @param mixed $value 存储数据
* @param int $expire 有效时间 0为永久
* @return boolean
*/
public function set($name, $value, $expire = null) {
N('cache_write', 1);
if (is_null($expire)) {
$expire = $this->options['expire'];
}
$filename = $this->filename($name);
$data = serialize($value);
if (C('DATA_CACHE_COMPRESS') && function_exists('gzcompress')) {
//数据压缩
$data = gzcompress($data, 3);
}
if (C('DATA_CACHE_CHECK')) {//开启数据校验
$check = md5($data);
} else {
$check = '';
}
$data = "options['length'] > 0) {
// 记录缓存队列
$this->queue($name);
}
clearstatcache();
return true;
} else {
return false;
}
}
/**
* 删除缓存
* @access public
* @param string $name 缓存变量名
* @return boolean
*/
public function rm($name) {
if ($name == '%') {
return $this->clearDir($this->options['temp'], true, $this->options['prefix']);
} else {
return $this->clearDir($this->filename($name));
}
}
/**
* 清除缓存
* @access public
* @param string $name 缓存变量名
* @return boolean
*/
public function clear() {
return $this->clearDir($this->options['temp']);
}
/**
* 清空目录
* @param string $dir 目录路径
* @param boolean $stay 是否保留目录
* @param string $pattern 文件筛选规则
* @return boolean
*/
protected function clearDir($dir, $stay = true, $pattern = null) {
if (is_dir($dir)) {
$dir = rtrim($dir, '\\/') . DIRECTORY_SEPARATOR;
$list = array_merge(glob($dir . '*', GLOB_ONLYDIR), glob($dir . "{$pattern}*.*", GLOB_NOSORT));
foreach ($list as $file) {
$this->clearDir($file, !is_null($pattern), $pattern);
}
$stay || $stay = rmdir($dir);
} elseif (is_file($dir)) {
return unlink($dir);
}
return $stay;
}
}
/php/33316.htmlwww.phpzy.comtrue/php/33316.htmlTechArticle文件缓存类,增加前缀清理功能-PHP源码 php代码 options = $options;}$this->options[temp] = !empty($options[temp]) ? $options[temp] : C(DATA_CACHE_PATH);$this->options[prefix] = isset($options[prefix]) ? $options[prefix] : C(D...
PHP之友评论