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PHP模板解析类

时间:2014-07-22 14:49来源: 作者: 点击:
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PHP模板解析类
PHP模板解析类
<?php

 
class template {
    private $vars = array();
    private $conf = '';
    private $tpl_name = 'index';//如果模板不存在 会查找当前 controller默认index模板
    private $tpl_suffix = '.html';//如果CONFIG没配置默认后缀 则显示
    private $tpl_compile_suffix= '.tpl.php';//编译模板路径
    private $template_tag_left = '<{';//模板左标签
    private $template_tag_right = '}>';//模板右标签
    private $template_c = '';//编译目录
    private $template_path = '';//模板完整路径 
    private $template_name = '';//模板名称 index.html
 
 
    //定义每个模板的标签的元素
    private $tag_foreach = array('from', 'item', 'key');
    private $tag_include = array('file');//目前只支持读取模板默认路径
 
    public function __construct($conf) {
        $this->conf = &$conf;
 
        $this->template_c = $this->conf['template_config']['template_c'];//编译目录
        $this->_tpl_suffix = $this->tpl_suffix();
    }
 
 

    private function str_replace($search, $replace, $content) {
        if(empty($search) || empty($replace) || empty($content)) return false;
        return str_replace($search, $replace, $content);
    }
 
    /**
     * preg_match_all
     * @param $pattern 正则
     * @param $content 内容
     * @return array
     */
 
    private function preg_match_all($pattern, $content) {
        if(empty($pattern) || empty($content)) core::show_error('查找模板标签失败!');
        preg_match_all("/".$this->template_tag_left.$pattern.$this->template_tag_right."/is", $content, $match);
        return $match;
    }
    /**
     * 模板文件后缀 
     */
    public function tpl_suffix() {
        $tpl_suffix = empty($this->conf['template_config']['template_suffix']) ? 
                            $this->tpl_suffix : 
                            $this->conf['template_config']['template_suffix'] ;
        return $tpl_suffix;
    }
 
    /**
     *  此处不解释了
     *  @return 
     */
    public function assign($key, $value) {
        $this->vars[$key] = $value;
    }
 
    /**
     *  渲染页面
     *  @param 
     *  使用方法 1
     *  $this->view->display('error', 'comm/');
     *  默认是指向TPL模版的跟目录,所以comm/就是 tpl/comm/error.html
     *  使用方法 2
     *  $this->view->display('errorfile'); 
     *  默认指向控制器固定的文件夹
     *  例如你的域名是 http://heartphp/admin/index, 那么正确路径就是tpl/admin/index/errorfile.html
     *  @return 
     */
    public function display($filename = '', $view_path = '') {
        $tpl_path_arr = $this->get_tpl($filename, $view_path);//获取TPL完整路径 并且向指针传送路径以及名称
        if(!$tpl_path_arr) core::show_error($filename.$this->_tpl_suffix.'模板不存在');
 
        //编译开始
        $this->view_path_param = $view_path;//用户传递过来的模版跟目录
        $this->compile();
 
    }
 
    /**
     *  编译控制器
     *  @param 
     *  @return 
     */
    private function compile() {
        $filepath = $this->template_path.$this->template_name;
        $compile_dirpath = $this->check_temp_compile();
        $vars_template_c_name = str_replace($this->_tpl_suffix, '', $this->template_name);
 
 
        $include_file = $this->template_replace($this->read_file($filepath), $compile_dirpath, $vars_template_c_name);//解析
        if($include_file) {
            $this->read_config() && $config = $this->read_config();
            extract($this->vars, EXTR_SKIP);
            [url=home.php?mod=space&uid=48608]@include[/url] $include_file;
        }
    }
 
    /**
     * 读取当前项目配置文件
     */
    protected function read_config() {
        if(file_exists(SYSTEM_PATH.'conf/config.php')) {
            @include SYSTEM_PATH.'conf/config.php'; 
            return $config;
        }
 
        return false;
    }
    /**
     *  解析模板语法
     *  @param $str 内容
     *  @param $compile_dirpath 模版编译目录
     *  @param $vars_template_c_name 模版编译文件名
     *  @return 编译过的PHP模板文件名
     */
    private function template_replace($str, $compile_dirpath, $vars_template_c_name) {
        if(empty($str)) core::show_error('模板内容为空!');
 
        //处理编译头部
        $compile_path = $compile_dirpath.$vars_template_c_name.$this->tpl_compile_suffix;//编译文件
 
        if(is_file($compile_path)) {
            //$header_content = $this->get_compile_header($compile_path);
            //$compile_date = $this->get_compile_header_comment($header_content);
 
            $tpl_filemtime = filemtime($this->template_path.$this->template_name);
            $compile_filemtime = filemtime($compile_path);
 
            //echo $tpl_filemtime.'=='.date('Y-m-d H:i:s', $tpl_filemtime).'<br/>';
            //echo $compile_filemtime.'=='.date('Y-m-d H:i:s', $compile_filemtime);
            //如果文件过期编译   当模板标签有include并且有修改时 也重新编译
            //<{include file="public/left.html"}> 当修改include里的文件,非DEBUG模式时  如果不更改主文件 目前是不重新编译include里的文件,我在考虑是否也要更改,没想好,暂时这样,所以在开发阶段一定要开启DEBUG=1模式 要不然修改include文件无效 。 有点罗嗦,不知道表述清楚没
            if($tpl_filemtime > $compile_filemtime || DEBUG) {
                $ret_file = $this->compile_file($vars_template_c_name, $str, $compile_dirpath);
            } else {
                $ret_file = $compile_path;
            }
        } else {//编译文件不存在 创建他
            $ret_file = $this->compile_file($vars_template_c_name, $str, $compile_dirpath);
        }
 
        return $ret_file;
    }
 
 
    /**
     *  模板文件主体
     *  @param  string  $str    内容
     *  @return html
     */
    private function body_content($str) {
        //解析
        $str = $this->parse($str);
 
        $header_comment = "Create On##".time()."|Compiled from##".$this->template_path.$this->template_name;
        $content = "<? if(!defined('IS_HEARTPHP')) exit('Access Denied');/*{$header_comment}*/?>\r\n$str";
 
        return $content;
    }
 
    /**
     *  开始解析相关模板标签
     * @param $content 模板内容
     */
    private function parse($content) {
        //foreach
        $content = $this->parse_foreach($content);
 
        //include
        $content = $this->parse_include($content);
 
        //if
        $content = $this->parse_if($content);
 
        //elseif
        $content = $this->parse_elseif($content);
 
        //模板标签公用部分
        $content = $this->parse_comm($content);  
 
        //转为PHP代码
        $content = $this->parse_php($content);
        return $content;
    }
 
    /**
     * echo 如果默认直接<{$config['domain']}> 转成 <?php echo $config['domain']?>
     */
    private function parse_echo($content) {
     
    }
 
    /**
     * 转换为PHP
     * @param $content html 模板内容
     * @return html 替换好的HTML
     */
    private function parse_php($content){
        if(empty($content)) return false;
        $content = preg_replace("/".$this->template_tag_left."(.+?)".$this->template_tag_right."/is", "<?php $1 ?>", $content);
 
        return $content;
    }
    /**
     * if判断语句
     * <{if empty($zhang)}>
     * zhang
     * <{elseif empty($liang)}>
     *  liang
     * <{else}>
     *  zhangliang
     * <{/if}>
     */
    private function parse_if($content) {
        if(empty($content)) return false;
        //preg_match_all("/".$this->template_tag_left."if\s+(.*?)".$this->template_tag_right."/is", $content, $match);
 
        $match = $this->preg_match_all("if\s+(.*?)", $content);
        if(!isset($match[1]) || !is_array($match[1])) return $content;
 
        foreach($match[1] as $k => $v) {
            //$s = preg_split("/\s+/is", $v);
            //$s = array_filter($s);
            $content = str_replace($match[0][$k], "<?php if({$v}) { ?>", $content);
        }
 
        return $content;
    }
 
    private function parse_elseif($content) {
        if(empty($content)) return false;
        //preg_match_all("/".$this->template_tag_left."elseif\s+(.*?)".$this->template_tag_right."/is", $content, $match);
        $match = $this->preg_match_all("elseif\s+(.*?)", $content);
        if(!isset($match[1]) || !is_array($match[1])) return $content;
 
        foreach($match[1] as $k => $v) {
            //$s = preg_split("/\s+/is", $v);
            //$s = array_filter($s);
            $content = str_replace($match[0][$k], "<?php } elseif ({$v}) { ?>", $content);
        }
 
        return $content;
    }
    /**
     * 解析 include    include标签不是实时更新的  当主体文件更新的时候 才更新标签内容,所以想include生效 请修改一下主体文件
     * 记录一下 有时间开发一个当DEBUG模式的时候 每次执行删除模版编译文件
     * 使用方法 <{include file="www.phpddt.com"}>
     * @param $content 模板内容
     * @return html
     */
    private function parse_include($content) {
        if(empty($content)) return false;
 
        //preg_match_all("/".$this->template_tag_left."include\s+(.*?)".$this->template_tag_right."/is", $content, $match);
        $match = $this->preg_match_all("include\s+(.*?)", $content);
        if(!isset($match[1]) || !is_array($match[1])) return $content;
 
        foreach($match[1] as $match_key => $match_value) {
            $a = preg_split("/\s+/is", $match_value);
 
            $new_tag = array();
            //分析元素
            foreach($a as $t) {
                $b = explode('=', $t);
                if(in_array($b[0], $this->tag_include)) {
                    if(!empty($b[1])) {
                        $new_tag[$b[0]] = str_replace("\"", "", $b[1]);
                    } else {
                        core::show_error('模板路径不存在!');
                    }
                }
            }
 
            extract($new_tag);
            //查询模板文件
            foreach($this->conf['view_path'] as $v){
                $conf_view_tpl = $v.$file;//include 模板文件
                if(is_file($conf_view_tpl)) {
                    $c = $this->read_file($conf_view_tpl);
 
 
                    $inc_file = str_replace($this->_tpl_suffix, '', basename($file));
 
                    $this->view_path_param = dirname($file).'/';
                    $compile_dirpath = $this->check_temp_compile();
 
                    $include_file = $this->template_replace($c, $compile_dirpath, $inc_file);//解析
 
                    break;
                } else {
                    core::show_error('模板文件不存在,请仔细检查 文件:'. $conf_view_tpl);
                }
            } 
     
            $content = str_replace($match[0][$match_key], '<?php include("'.$include_file.'")?>', $content);
        }
 
        return $content;
             
    }
    /**
     * 解析 foreach
     * 使用方法 <{foreach from=$lists item=value key=kk}>
     * @param $content 模板内容
     * @return html 解析后的内容
     */
    private function parse_foreach($content) {
        if(empty($content)) return false;
 
        //preg_match_all("/".$this->template_tag_left."foreach\s+(.*?)".$this->template_tag_right."/is", $content, $match);
        $match = $this->preg_match_all("foreach\s+(.*?)", $content);
        if(!isset($match[1]) || !is_array($match[1])) return $content;
 
        foreach($match[1] as $match_key => $value) {
     
            $split = preg_split("/\s+/is", $value);
            $split = array_filter($split);
 
            $new_tag = array();
            foreach($split as $v) {
                $a = explode("=", $v);
                if(in_array($a[0], $this->tag_foreach)) {//此处过滤标签 不存在过滤
                    $new_tag[$a[0]] = $a[1];
                }
            }
            $key = '';
 
            extract($new_tag);
            $key = ($key) ? '$'.$key.' =>' : '' ;
            $s = '<?php foreach('.$from.' as '.$key.' $'.$item.') { ?>';
            $content = $this->str_replace($match[0][$match_key], $s, $content);
 
        }
 
        return $content;
    }
 
    /**
     * 匹配结束 字符串
     */
    private function parse_comm($content) {
        $search = array(
            "/".$this->template_tag_left."\/foreach".$this->template_tag_right."/is",
            "/".$this->template_tag_left."\/if".$this->template_tag_right."/is",
            "/".$this->template_tag_left."else".$this->template_tag_right."/is",
 
        );
 
        $replace = array(
            "<?php } ?>",
            "<?php } ?>",
            "<?php } else { ?>"
        );
        $content = preg_replace($search, $replace, $content);
        return $content;
    }
    /**
     *  检查编译目录  如果没有创建 则递归创建目录
     *  @param  string  $path   文件完整路径
     *  @return 模板内容
     */
    private function check_temp_compile() {
        //$paht = $this->template_c.
 
        $tpl_path = ($this->view_path_param) ? $this->view_path_param : $this->get_tpl_path() ;
        $all_tpl_apth = $this->template_c.$tpl_path;
 
        if(!is_dir($all_tpl_apth)) {
            $this->create_dir($tpl_path);
        }
 
        return $all_tpl_apth;
    }
    /**
     *  读文件
     *  @param  string  $path   文件完整路径
     *  @return 模板内容
     */
    private function read_file($path) {
        //$this->check_file_limits($path, 'r');
         
        if(($r = @fopen($path, 'r')) === false) {
            core::show_error('模版文件没有读取或执行权限,请检查!');
        }
        $content = fread($r, filesize($path));
        fclose($r);
        return $content;
    }
 
    /**
     *  写文件
     *  @param  string  $filename   文件名
     *  @param  string  $content    模板内容
     *  @return 文件名
     */
    private function compile_file($filename, $content, $dir) {
        if(empty($filename)) core::show_error("{$filename} Creation failed");
 
        $content = $this->body_content($content);//对文件内容操作
        //echo '开始编译了=====';
        $f = $dir.$filename.$this->tpl_compile_suffix;
 
        //$this->check_file_limits($f, 'w');
        if(($fp = @fopen($f, 'wb')) === false) {
            core::show_error($f.'<br/>编译文件失败,请检查文件权限.');
        }
        //开启flock
        flock($fp, LOCK_EX + LOCK_NB);
        fwrite($fp, $content, strlen($content));
        flock($fp, LOCK_UN + LOCK_NB);
        fclose($fp);
 
        return $f;
    }
 
    /**
     * 这个检查文件权限函数 暂时废弃了
     * @param  [$path] [路径]
     * @param  [status] [w=write, r=read]
     */
    public function check_file_limits($path , $status = 'rw') {
        clearstatcache();
        if(!is_writable($path) && $status == 'w') {
            core::show_error("{$path}<br/>没有写入权限,请检查.");
        } elseif(!is_readable($path) && $status == 'r') {
            core::show_error("{$path}<br/>没有读取权限,请检查.");
        } elseif($status == 'rw') {//check wirte and read
            if(!is_writable($path) || !is_readable($path)) {
                core::show_error("{$path}<br/>没有写入或读取权限,请检查");
            }
        }
 
         
    }
 
    /**
     *  读取编译后模板的第一行 并分析成数组
     *  @param  string  $filepath  文件路径
     *  @param  number  $line        行数
     *  @return 返回指定行数的字符串 
     */
    /*
    private function get_compile_header($filepath, $line = 0) {
 
        if(($file_arr = @file($filepath)) === false) {
            core::show_error($filepath.'<br/>读取文件失败,请检查文件权限!');
        }
        return $file_arr[0];
    }
    */
 
    /**
     * 分析头部注释的日期
     *  @param  string  $cotnent  编译文件头部第一行
     *  @return 返回上一次日期 
     */
    /*
    private function get_compile_header_comment($content) {
        preg_match("/\/\*(.*?)\*\//", $content, $match);
        if(!isset($match[1]) || empty($match[1])) core::show_error('编译错误!');    
        $arr = explode('|', $match[1]);
        $arr_date = explode('##', $arr[0]);
 
        return $arr_date[1];
    }
    */
    /**
     *  获取模板完整路径 并返回已存在文件
     *  @param  string  $filename   文件名
     *  @param  string  $view_path  模板路径 
     *  @return 
     */
    private function get_tpl($filename, $view_path) {
        empty($filename) && $filename = $this->tpl_name;
 
        //遍历模板路径
        foreach($this->conf['view_path'] as $path) {
            if($view_path) {//直接从tpl跟目录找文件
                $tpl_path = $path.$view_path;
                $view_file_path = $tpl_path.$filename.$this->_tpl_suffix;
            } else {//根据目录,控制器,方法开始找文件
                $view_file_path = ($tpl_path = $this->get_tpl_path($path)) ? $tpl_path.$filename.$this->_tpl_suffix  : exit(0);
            }
 
            if(is_file($view_file_path)) {
                //向指针传送模板路径和模板名称
                $this->template_path = $tpl_path;//
                $this->template_name = $filename.$this->_tpl_suffix;
                return true;
            } else {
                core::show_error($filename.$this->_tpl_suffix.'模板不存在');
            }
        }
    }
 
    /**
     *  获取模板路径
     *  @param  string  $path   主目录
     *  @return URL D和M的拼接路径
     */
    private function get_tpl_path($path = '') {
        core::get_directory_name() && $path_arr[0] = core::get_directory_name();
        core::get_controller_name() && $path_arr[1] = core::get_controller_name();
        (is_array($path_arr)) ? $newpath = implode('/', $path_arr) : core::show_error('获取模板路径失败!') ;
 
        return $path.$newpath.'/';
    }
 
    /**
     *  创建目录
     *  @param  string  $path   目录
     *  @return 
     */
    private function create_dir($path, $mode = 0777){
        if(is_dir($path)) return false;
 
        $dir_arr = explode('/', $path);
        $dir_arr = array_filter($dir_arr);
 
        $allpath = '';
        $newdir = $this->template_c;
 
        foreach($dir_arr as $dir) {
            $allpath = $newdir.'/'.$dir;
 
            if(!is_dir($allpath)) {
                $newdir = $allpath;
 
                if(!@mkdir($allpath, $mode)) {
                    core::show_error( $allpath.'<br/>创建目录失败,请检查是否有可都写权限!');
                }
                chmod($allpath, $mode);
            } else {
                $newdir = $allpath;
            }
        }
        return true;
    }
 
    public function __destruct(){
        $this->vars = null;
        $this->view_path_param = null;
    }
 
};
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