MyMiniSmarty.class.php

1 
      tpl_vars[$tpl_var] = $var;19             }20         }21         //替换占位符编译成可运行文件22         function display($tpl_file) {23             $tpl_file_path = $this->template_dir . $tpl_file;24             $complie_file_path = $this->compile_dir . 'com_' . $tpl_file . '.php';25             if (!file_exists($tpl_file_path)) {26                 return false;27             }28             //判断是否有缓存文件，以前编译过,检查模板文件和编译文件修改时间29             if (!file_exists($complie_file_path) || filemtime($tpl_file_path) > filemtime($complie_file_path)) {30                 $fpl_file_con = file_get_contents($tpl_file_path);31             32                 //核心是正则替换33                 34                 $pattern = array(35                     '/\{\s*\$([a-zA-Z_]\w*)\s*\}/i'36                 );37                 $replace = array(38                     '
      tpl_vars["${1}"] ?>'    39                 );40                 41                 $new_str = preg_replace($pattern, $replace, $fpl_file_con);42                 43                 file_put_contents($complie_file_path, $new_str);44             }45             46             47             48             49             //引用编译后的文件50             include($complie_file_path);51         }52         53     }54 ?>

intro.php

      assign('title', '模板标题');    $mysmarty->assign('content', '模板内容');    $mysmarty->display('intro.tpl');?>

intro.tpl

      {$content}

模板机制在于，简单标签代替php代码，使逻辑代码和页面设计分离，同时加入文件缓存等机制