Simple.php

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<?php
// FleaPHP Framework
//
// Copyright (c) 2005 - 2008 QeeYuan China Inc. (http://www.qeeyuan.com)
//
// 许可协议，请查看源代码中附带的 LICENSE.txt 文件，
// 或者访问 http://www.fleaphp.org/ 获得详细信息。

class FLEA_View_Simple
{
    var $path;

    var $cacheLifetime;

    var $enableCache;

    var $cacheDir;

    var $vars;

    var $cacheState;

    function FLEA_View_Simple($path = null) {
        log_message('Construction FLEA_View_Simple', 'debug');
        $this->path = $path;
        $this->cacheLifetime = 900;
        $this->enableCache = true;
        $this->cacheDir = './cache';
        $this->vars = array();
        $this->cacheState = array();
    }

    function assign($name, $value = null) {
        if (is_array($name) && is_null($value)) {
            $this->vars = array_merge($this->vars, $name);
        } else {
            $this->vars[$name] = $value;
        }
    }

    function & fetch($file, $cacheId = null) {
        if ($this->enableCache) {
            $cacheFile = $this->_getCacheFile($file, $cacheId);
            if ($this->isCached($file, $cacheId)) {
                return file_get_contents($cacheFile);
            }
        }

        // 生成输出内容并缓存
        extract($this->vars);
        ob_start();

        include($this->path . DIRECTORY_SEPARATOR . $file);
        $contents = ob_get_contents();
        ob_end_clean();

        if ($this->enableCache) {
            // 缓存输出内容，并保存缓存状态
            $this->cacheState[$cacheFile] = file_put_contents($cacheFile, $contents) > 0;
        }

        return $contents;
    }

    function display($file, $cacheId = null) {
        echo $this->fetch($file, $cacheId);
    }

    function isCached($file, $cacheId = null) {
        // 如果禁用缓存则返回 false
        if (!$this->enableCache) { return false; }

        // 如果缓存标志有效返回 true
        $cacheFile = $this->_getCacheFile($file, $cacheId);
        if (isset($this->cacheState[$cacheFile]) && $this->cacheState[$cacheFile]) {
            return true;
        }

        // 检查缓存文件是否存在
        if (!is_readable($cacheFile)) { return false; }

        // 检查缓存文件是否已经过期
        $mtime = filemtime($cacheFile);
        if ($mtime == false) { return false; }
        if (($mtime + $this->cacheLifetime) < time()) {
            $this->cacheState[$cacheFile] = false;
            @unlink($cacheFile);
            return false;
        }

        $this->cacheState[$cacheFile] = true;
        return true;
    }

    function cleanCache($file, $cacheId = null) {
        @unlink($this->_getCacheFile($file, $cacheId));
    }

    function cleanAllCache() {
        foreach (glob($this->cacheDir . '/' . "*.php") as $filename) {
            @unlink($filename);
        }
    }

    function _getCacheFile($file, $cacheId) {
        return $this->cacheDir . DIRECTORY_SEPARATOR .
            rawurlencode($file . '-' . $cacheId) . '.php';
    }
}

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