PHP template parsing class

PHP template parsing class

class template {
 private $vars = array();
 private $conf = '';
 private $tpl_name = 'index';//If the template does not exist, the current controller will be searched Default index template
 private $tpl_suffix = '.html';//If CONFIG is not configured with a default suffix, it will be displayed
 private $tpl_compile_suffix= '.tpl.php';//Compile template path
 private $template_tag_left = ' private $template_tag_right = '}>';//Template right tag
 private $template_c = '';//Compilation directory
 private $template_path = '';//Template full path
 private $ template_name = '';//Template name index.html


 //Elements that define the tags of each template
 private $tag_foreach = array('from', 'item', 'key');
 private $tag_include = array('file');//Currently only supports reading the default path of the template

 public function __construct($conf) {
 $this->conf = &$conf;

 $this->template_c = $this ->conf['template_config']['template_c'];//Compilation directory
 $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 regular
 * @param $content content
 * @return array
*/

 private function preg_match_all($pattern, $content) {
 if(empty($pattern) || empty($content)) core::show_error('Failed to find template tag!') ;
 preg_match_all("/".$this->template_tag_left.$pattern.$this->template_tag_right."/is", $content, $match);
 return $match;
 }
 /**
 * Template file suffix
*/
 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;
 }

 /**
 * No explanation here
 * @return
*/
 public function assign($key, $value) {
 $this->vars[$key] = $value;
 }

 /**
 * Render page
 * @param
 * Usage method 1
 * $this->view->display('error', 'comm/');
 * The default is to point to the following directory of the TPL template, so comm/ It is tpl/comm/error.html
 * Usage method 2
 * $this->view->display('errorfile');
 * By default, it points to the folder fixed by the controller
 * For example, your domain name is http: //heartphp/admin/index, then the correct path is tpl/admin/index/errorfile.html
 * @return
*/
 public function display($filename = '', $view_path = '') {
 $tpl_path_arr = $this->get_tpl($filename, $view_path );//Get the TPL full path and transfer the path and name to the pointer
 if(!$tpl_path_arr) core::show_error($filename.$this->_tpl_suffix.'Template does not exist');

 //Compilation starts
 $this->view_path_param = $view_path;//The template and directory passed by the user
 $this->compile();

 }

 /**
 * Compile controller
 * @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, $vars_template_c_name);//Parse
 if($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;
 }
 }

 /**
 * Read the current project configuration file
*/
 protected function read_config() {
 if(file_exists(SYSTEM_PATH.'conf/config.php')) {
 @include SYSTEM_PATH.'conf/ config.php';
 return $config;
 }

 return false;
 }
 /**
 * Parse template syntax
 * @param $str content
 * @param $compile_dirpath template compilation directory
 * @param $vars_template_c_name template compilation file name
 * @return compiled PHP template file name
*/
 private function template_replace($str, $compile_dirpath, $vars_template_c_name) {
 if(empty($str)) core::show_error('Template content is empty!');

 / /Process compilation header
 $compile_path = $compile_dirpath.$vars_template_c_name.$this->tpl_compile_suffix;//Compile file

 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).'';
 //echo $compile_filemtime.'== '.date('Y-m-d H:i:s', $compile_filemtime);
 //If the file expires, compile and the template tag has include and is modified. Also recompile
 // When modifying the files in the include, in non-DEBUG mode, if the main file is not changed, the files in the include are not recompiled at present. I am considering whether to change it as well. I haven't thought about it. This is the case for the time being, so in the development stage Be sure to turn on DEBUG=1 mode, otherwise modifying the include file will be invalid.有点罗嗦，不知道表述清楚没
            if($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;
    }


    /**
 * Template file body
 * @param string $str content
 * @return html
*/
    private function body_content($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}*/?>rn$str";

        return $content;
    }

    /**
 * Start parsing related template tags
 * @param $content template content
*/
    private function parse($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;
    }

    /**
 * If echo is directly  by default, it will be converted to
*/
    private function parse_echo($content) {

    }

    /**
 * Convert to PHP
 * @param $content html template content
 * @return html Replaced HTML
*/
    private function parse_php($content){
        if(empty($content)) return false;
        $content = preg_replace("/".$this->template_tag_left."(.+?)".$this->template_tag_right."/is", "", $content);

        return $content;
    }
    /**
     * if判断语句
     *
     * zhang
     *
     *  liang
     *
     *  zhangliang
     *
*/
    private function parse_if($content) {
        if(empty($content)) return false;
        //preg_match_all("/".$this->template_tag_left."ifs+(.*?)".$this->template_tag_right."/is", $content, $match);

        $match = $this->preg_match_all("ifs+(.*?)", $content);
        if(!isset($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], "", $content);
        }

        return $content;
    }

    private function parse_elseif($content) {
        if(empty($content)) return false;
        //preg_match_all("/".$this->template_tag_left."elseifs+(.*?)".$this->template_tag_right."/is", $content, $match);
        $match = $this->preg_match_all("elseifs+(.*?)", $content);
        if(!isset($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], "", $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
     * @param $content 模板内容
     * @return html
     */
    private function parse_include($content) {
        if(empty($content)) return false;

        //preg_match_all("/".$this->template_tag_left."includes+(.*?)".$this->template_tag_right."/is", $content, $match);
        $match = $this->preg_match_all("includes+(.*?)", $content);
        if(!isset($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], '', $content);
        }

        return $content;

    }
    /**
 * Parse foreach
 * Usage method
 * @param $content template content
 * @return html parsed content
*/
    private function parse_foreach($content) {
        if(empty($content)) return false;

        //preg_match_all("/".$this->template_tag_left."foreachs+(.*?)".$this->template_tag_right."/is", $content, $match);
        $match = $this->preg_match_all("foreachs+(.*?)", $content);
        if(!isset($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 = '';
            $content = $this->str_replace($match[0][$match_key], $s, $content);

        }

        return $content;
    }

    /**
 * End of match string
*/
    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(
            "",
            "",
            ""
        );
        $content = preg_replace($search, $replace, $content);
        return $content;
    }
    /**
 * Check the compilation directory. If it is not created, create the directory recursively
 * @param string $path The full path of the file
 * @return Template content
*/
    private function check_temp_compile() {
        //$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;
    }
    /**
 * Read file
 * @param string $path The full path of the file
 * @return Template content
*/
    private function read_file($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;
    }

    /**
 * Write file
 * @param string $filename file name
 * @param string $content template content
 * @return file name
*/
    private function compile_file($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($f.'编译文件失败，请检查文件权限.');
        }
        //开启flock
        flock($fp, LOCK_EX + LOCK_NB);
        fwrite($fp, $content, strlen($content));
        flock($fp, LOCK_UN + LOCK_NB);
        fclose($fp);

        return $f;
    }

    /**
 * This function to check file permissions is temporarily abandoned
 * @param [$path] [path]
 * @param [status] [w=write, r=read]
*/
    public function check_file_limits($path , $status = 'rw') {
        clearstatcache();
        if(!is_writable($path) && $status == 'w') {
            core::show_error("{$path}没有写入权限，请检查.");
        } elseif(!is_readable($path) && $status == 'r') {
            core::show_error("{$path}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}没有写入或读取权限，请检查");
            }
        }


    }

    /**
 * Read the first line of the compiled template and analyze it into an array
 * @param string $filepath file path
 * @param number $line number of lines
 * @return returns a string with the specified number of lines
*/
    /*
    private function get_compile_header($filepath, $line = 0) {

        if(($file_arr = @file($filepath)) === false) {
            core::show_error($filepath.'读取文件失败，请检查文件权限！');
 }
 return $file_arr[0];
 }
 */

 /**
 * Date of analysis of header comments
 * @param string $cotnent The first line of the header of the compiled file
 * @return Returns the last date
*/
 /*
 private function get_compile_header_comment($content) {
 preg_match("//*(.* ?)*//", $content, $match);
 if(!isset($match[1]) || empty($match[1])) core::show_error('Compilation error!');
 $arr = explode('|', $match[1]);
 $arr_date = explode('##', $arr[0]);

 return $arr_date[1];
 }
 */
 / **
 * Get the full path of the template and return the existing file
 * @param string $filename file name
 * @param string $view_path template path
 * @return
*/
 private function get_tpl($filename, $view_path) {
 empty($filename) && $filename = $this->tpl_name;

 //Traverse the template path
 foreach($this-> ;conf['view_path'] as $path) {
 if($view_path) {//Find files directly from tpl and directory
 $tpl_path = $path.$view_path;
 $view_file_path = $tpl_path.$filename.$this ->_tpl_suffix;
 } else {//Start looking for files based on the directory, controller, and method
 $view_file_path = ($tpl_path = $this->get_tpl_path($path)) ? $tpl_path.$filename.$this- >_tpl_suffix : exit(0);
 }

 if(is_file($view_file_path)) {
 //Transfer template path and template name to the pointer
 $this->template_path = $tpl_path;//
 $this- >template_name = $filename.$this->_tpl_suffix;
 return true;
 } else {
 core::show_error($filename.$this->_tpl_suffix.'Template does not exist');
 }
 }
 }

 /**
 * Get the template path
 * @param string $path Home directory
 * @return URL The splicing path of D and M
*/
 private function get_tpl_path($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('Failed to get template path!') ;

 return $path.$newpath.'/';
 }

 /**
 * Create directory
 * @param string $path directory
 * @return
*/
 private function create_dir($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( $allpath.'Failed to create the directory, please check whether you have write permissions! ');
 }
 chmod($allpath, $mode);
 } else {
 $newdir = $allpath;
 }
 }
 return true;
 }

 public function __destruct(){
 $this-> vars = null;
 $this->view_path_param = null;
 }

};