php制作简单模版引擎

<"<",$this->_tpl);
    }
  }
 
  //解析IF语句
  private function parif(){
    $_pattenif = '/<!--\s+\{if\s+\$([\w]+)\}\s+-->/';
    $_pattenElse = '/<!--\s+\{else\}\s+-->/';
    $_pattenEndif = '/<!--\s+\{\/if\}\s+-->/';
    if (preg_match($_pattenif,$this->_tpl)) {
      if (preg_match($_pattenEndif,$this->_tpl)) {
        $this->_tpl = preg_replace($_pattenif,"<",$this->_tpl);
        $this->_tpl = preg_replace($_pattenEndif,"<",$this->_tpl);
        if (preg_match($_pattenElse,$this->_tpl)) {
          $this->_tpl = preg_replace($_pattenElse,"<",$this->_tpl);
        }
      }else{
      echo 'ERROR:IF语句没有关闭！';
      }
    }
  }
 
  //PHP注释解析
 
  private function parCommon(){
    $_pattenCommon = '/<!--\s+\{#\}(.*)\{#\}\s+-->/';
    if (preg_match($_pattenCommon,$this->_tpl)) {
      $this->_tpl = preg_replace($_pattenCommon,"<",$this->_tpl);
    }
  }
   
  //解析foreach语句
  private function parForeach(){
    $_pattenForeach = '/<!--\s+\{foreach\s+\$([\w]+)\(([\w]+),([\w]+)\)\}\s+-->/';
    $_pattenForeachEnd = '/<!--\s+\{\/foreach\}\s+-->/';
    $_pattenForeachValue = '/<!--\s+\{@([\w]+)\}\s+-->/';
    if (preg_match($_pattenForeach,$this->_tpl)) {
      if (preg_match($_pattenForeachEnd,$this->_tpl)) {
        $this->_tpl = preg_replace($_pattenForeach, "<", $this->_tpl);
        $this->_tpl = preg_replace($_pattenForeachEnd, "<", $this->_tpl);
        if (preg_match($_pattenForeachValue, $this->_tpl)) {
          $this->_tpl = preg_replace($_pattenForeachValue,"<",$this->_tpl);
        }
      }else{
      echo 'ERROR:Foreach语句没有关闭！';  
      }
    }
  }
 
  //解析include方法
  private function parInclude(){
    $_pattenInclude = '/<!--\s+\{include\s+file=\"([\w\.\-]+)\"\}\s+-->/';
    if (preg_match($_pattenInclude,$this->_tpl,$_file,$_file)) {
      if (!file_exists($_file[1])||empty($_file)) {
        echo 'ERROR:包含文件出错！';
      }
      $this->_tpl = preg_replace($_pattenInclude,"<",$this->_tpl);
    }
  }
 
  //解析系统变量方法
  private function parConfig(){
    $_pattenConfig = '/<!--\s+\{([\w]+)\}\s+-->/';
    if (preg_match($_pattenConfig,$this->_tpl)) {
      $this->_tpl = preg_replace($_pattenConfig,"<",$this->_tpl);
    }
  }
  // 对外公共方法
  public function compile($_path)
  {
    // 解析模版文件
    $this->parvar();
    $this->parif();
    $this->parForeach();
    $this->parInclude();
    $this->parCommon();
    $this->parConfig();
    // 生成编译文件
    if (! file_put_contents($_path, $this->_tpl)) {
      exit('ERROR:编译文件生成错误！');
    }
  }
}
"htmlcode">

<"<br />";
      if (!is_dir(TPL_DIR)) {
        mkdir(TPL_DIR);
        echo '模版目录'.TPL_DIR.'建立'."<br />";
      }
      if (!is_dir(TPL_C_DIR)) {
        mkdir(TPL_C_DIR);
        echo '编译目录'.TPL_C_DIR.'建立'."<br />";
      }
      if (!is_dir(CACHE)) {
        mkdir(CACHE);
        echo '缓存目录'.CACHE.'建立'."<br />";
      }
      if (!is_dir(CONFIG)) {
        mkdir(CONFIG);
        echo '缓存目录'.CONFIG.'建立'."<br />";
      }
      exit();
    }
    //保存系统变量
    $_sxe = simplexml_load_file(CONFIG.'/config.xml');
    $_tagLib = $_sxe->xpath('/root/taglib');
    foreach ($_tagLib as $_tag) {
      $this->_config["$_tag->name"] = $_tag->value;
    }
  }
 
  //assign()方法，用于注入变量
  public function assign($_var,$_value){
    //$_var用于同步模版里的变量名
    //$_value表示值
    if (isset($_var)&&!empty($_var)) {
      $this->_vars[$_var] = $_value;
    }else{
      exit('ERROR:设置模版变量！');
    }
 
  }
 
  //display()方法
  public function display($_file)
  {
    $_tplFile = TPL_DIR . $_file;
    // 判断文件是否存在
    if (! file_exists($_tplFile)) {
      echo 'ERROR:模版文件不存在！自动创建Index.tpl模版文件！';
      file_put_contents($_tplFile,'Index');
      exit();
    }
 
    //生成编译文件
    $_path = TPL_C_DIR.md5($_file).'-'.$_file.'.php';
    //缓存文件
    $_cacheFile = CACHE.md5($_file).'-'.$_file.'.html';
    //当第二次运行相同文件，直接载入缓存文件
    if (IS_CACHE) {
      //判断缓存文件和编译文件都存在
      if (file_exists($_cacheFile)&&file_exists($_path)) {
        //判断模版文件是否修改过
        if (filemtime($_path)>=filemtime($_tplFile)&&filemtime($_cacheFile)>=filemtime($_path)) {
          include $_cacheFile;
          echo '<!--cache-->';
          return;
        }
      }
    }
    //当编译文件不存在或者文件发生改变则重新生成
    if (!file_exists($_path)||filemtime($_path)<filemtime($_tplFile)) {
      require ROOT_PATH.'/Class/parser.class.php';
      //构造方法是传入模版文件地址
      $_parser = new Parser($_tplFile);
      //传入编译文件地址
      $_parser->compile($_path);
    }
    //载入编译文件
    include $_path;
    if (IS_CACHE) {
      //获取缓冲区数据
      file_put_contents($_cacheFile,ob_get_contents());
      //清楚缓冲区
      ob_end_clean();
      //载入缓存文件
      include $_cacheFile;
    }
  }
}
"htmlcode">

<"htmlcode">

<!DOCTYPE html>
<html lang="zn-cn">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1, maximum-scale=1, user-scalable=no">
  <meta name="description" content="">
  <meta name="keywords" content="">
  <meta name="author" content="">
  <meta name="author" content="">
  <title><!-- {WebName} --></title>
  <link rel="stylesheet" type="text/css" href="css/bootstrap.min.css">
  <link rel="stylesheet" type="text/css" href="css/style.css">
  </head>
<body>
 
<!-- {#}php注释{#} -->
<!-- {if $a} -->
123
<!-- {else} -->
321
<!-- {/if} -->
<br />
<!-- {foreach $array(key,value)} -->
  <!-- {@key} -->...<!-- {@value} --><br />
<!-- {/foreach} -->
系统变量<!-- {WebName} --><br />
普通变量<!-- {$name} --><br />

  <script src="/UploadFiles/2021-04-02/jquery-2.2.1.min.js">

config/config.xml


<"1.0" encoding="UTF-8"?>
<root>
  <taglib>
    <name>WebName</name>
    <value>XXX网站</value>
  </taglib>
</root>





            
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