public function cleanAllCache()
{
$array = list_dir_file($this->cacheDir);
$array = $array ? $array : array();
foreach ($array as $cacheFile) {
if ($cacheFile['extension'] == 'cache') {
@unlink($cacheFile['path']);
}
}
}
/**
* @des 获取指定logid的附图 方法体内部自动实现查询、缓存 提升系统执行效率
* @des 注意：本方法额外添加了一个logimageatt缓存字段 方法体外部不宜调用该字段
* CACHE structure::
* array{
* log_id => array('url'=>log_att_image_url,'time'=>unixtimestamp);
* }
* @param $logid 日志id
* @return string => log attachement image url(include blog_url)
*/
function getLogImageAtt($logid)
{
global $CACHE;
/*缓存文件不存在，建立空值缓存文件先*/
if (!is_file(EMLOG_ROOT . '/content/cache/logimageatt.php')) {
$CACHE->cacheWrite(serialize(array(0 => array('url' => TEMPLATE_URL . 'images/noImg.png', 'time' => time()))), 'logimageatt');
}
$logImageAtt = $CACHE->readCache('logimageatt');
if (!empty($logImageAtt) && !empty($logImageAtt[$logid])) {
//12小时候重建缓存以处理可能要替换文章附图的情况 默认不重建
if (_g('up_cache')) {
if ($logImageAtt[$logid]['time'] + 12 * 3600 > time()) {
return $logImageAtt[$logid]['url'];
}
} else {
return $logImageAtt[$logid]['url'];
}
}
//缓存中不存在 建立缓存并返回数据
$Db = Database::getInstance();
$query = $Db->query("SELECT * FROM " . DB_PREFIX . "attachment WHERE `blogid`=" . $logid . " ORDER BY `aid` DESC");
$_attcache = TEMPLATE_URL . 'images/noImg.png';
//待裁剪图片数据 优先使用已有220px*150px的附图
$_imageArr = array('rdir' => '', 'cdir' => '', 'width' => 0, 'height' => 0);
while ($row = $Db->fetch_array($query)) {
if ($row['width'] == 220 && $row['height'] == 150) {
$_attcache = BLOG_URL . ltrim(ltrim($row['filepath'], '.'), '/');
break;
}
$fileAbsoluteDir = '.' . ltrim($row['filepath'], '.');
//图片目录相对于入口文件的路径
$suffix = strtolower(getFileSuffix($row['filepath']));
/*兼容老系统产生的无宽度、高度的图片尺寸*/
if (is_file($fileAbsoluteDir) && in_array($suffix, array('jpg', 'png', 'jpeg', 'gif')) && $row['width'] == 0 && $row['height'] == 0) {
$size = @getimagesize($fileAbsoluteDir);
//读取图片尺寸情况
//方法getimagesize存在异常 返回false和错误信息 抑制并退出
if (false === $size) {
break;
}
if ($size[0] == 220 && $size[1] == 150) {
$_attcache = BLOG_URL . ltrim(ltrim($row['filepath'], '.'), '/');
break;
} else {
$row['width'] = $size[0];
$row['height'] = $size[1];
}
}
//缩略图相对路径 强行指定缩略图为jpg后缀格式
$fileCorpDir = '.' . ltrim(pathinfo($fileAbsoluteDir, PATHINFO_DIRNAME), '.') . '/' . $logid . '.jpg';
//依据设置参数进行是否强行重建
if (is_file($fileCorpDir) && !_g('up_cache')) {
$_attcache = BLOG_URL . ltrim(ltrim($fileCorpDir, '.'), '/');
break;
}
//收集尺寸最大的图片进行裁剪
if ($row['width'] > 220 && $row['height'] > 150) {
if (is_file($fileAbsoluteDir) && ($row['width'] > $_imageArr['width'] || $row['height'] > $_imageArr['height'])) {
$_imageArr = array('rdir' => $fileAbsoluteDir, 'cdir' => $fileCorpDir, 'width' => $row['width'], 'height' => $row['height']);
}
}
}
//附图需要进行裁剪
if ($_attcache == TEMPLATE_URL . 'images/noImg.png' && $_imageArr['width'] > 0) {
$ret = JcorpImage($_imageArr['rdir'], $_imageArr['cdir'], $_imageArr['width'], $_imageArr['height']);
if ($ret) {
$_attcache = BLOG_URL . ltrim(ltrim($_imageArr['cdir'], '.'), '/');
}
}
//是否启用随机默认附图
if ($_attcache == TEMPLATE_URL . 'images/noImg.png' && _g('open_rdm')) {
$randomeImage = list_dir_file(EMLOG_ROOT . '/content/templates/J2/images/randoms/');
$max = count($randomeImage) - 1;
$rdmKey = rand(0, $max);
$_attcache = $randomeImage[$rdmKey];
}
//添加新单元数据
$logImageAtt[$logid] = array('url' => $_attcache, 'time' => time());
$CACHE->cacheWrite(serialize($logImageAtt), 'logimageatt');
return $_attcache;
}
