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    php制作簡單模版引擎,php模版引擎
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    ? ??? ?? PHP ???? php制作簡單模版引擎,php模版引擎_PHP教程

    php制作簡單模版引擎,php模版引擎_PHP教程

    Jul 12, 2016 am 08:54 AM
    php ??? ??

    php制作簡單模版引擎,php模版引擎

    PHP模板引擎就是一個PHP類庫,使用它可以使PHP代碼和HTML代碼進行分離,使代碼的可讀性和維護性得到顯著提高。而且這樣做的好處是,讓美工專心設(shè)計HTML前臺頁面,程序員專心去寫PHP業(yè)務(wù)邏輯。因此,?;婧苓m合公司的Web開發(fā)團隊使用,使每個人都能發(fā)揮其特長

    下面我們就來看看如何簡單的來實現(xiàn)php的模板引擎

    parser.class.php

    <&#63;php
     
    /**
     * 模版解析類
     */
    class Parser
    {
      // 字段,接收模版文件內(nèi)容
      private $_tpl;
       
      // 構(gòu)造方法,獲取模版文件內(nèi)容
      public function __construct($_tplFile)
      {
        if (! $this->_tpl = file_get_contents($_tplFile)) {
          exit('ERROR:模版文件讀取錯誤');
        }
      }
       
      // 解析普通變量
      private function parvar()
      {
        $_patten = '/<!--\s+\{\$([\w]+)\}\s+-->/';
        if (preg_match($_patten,$this->_tpl)) {
          $this->_tpl = preg_replace($_patten, "<&#63;php echo \$this->_vars['$1'];&#63;>",$this->_tpl);
        }
      }
     
      //解析IF語句
      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,"<&#63;php if (\$this->_vars['$1']){&#63;>",$this->_tpl);
            $this->_tpl = preg_replace($_pattenEndif,"<&#63;php } &#63;>",$this->_tpl);
            if (preg_match($_pattenElse,$this->_tpl)) {
              $this->_tpl = preg_replace($_pattenElse,"<&#63;php }else{&#63;>",$this->_tpl);
            }
          }else{
          echo 'ERROR:IF語句沒有關(guān)閉!';
          }
        }
      }
     
      //PHP注釋解析
     
      private function parCommon(){
        $_pattenCommon = '/<!--\s+\{#\}(.*)\{#\}\s+-->/';
        if (preg_match($_pattenCommon,$this->_tpl)) {
          $this->_tpl = preg_replace($_pattenCommon,"<&#63;php /* $1 */ &#63;>",$this->_tpl);
        }
      }
       
      //解析foreach語句
      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, "<&#63;php foreach (\$this->_vars['$1'] as \$$2=>\$$3) {&#63;>", $this->_tpl);
            $this->_tpl = preg_replace($_pattenForeachEnd, "<&#63;php }&#63;>", $this->_tpl);
            if (preg_match($_pattenForeachValue, $this->_tpl)) {
              $this->_tpl = preg_replace($_pattenForeachValue,"<&#63;php echo \$$1;&#63;>",$this->_tpl);
            }
          }else{
          echo 'ERROR:Foreach語句沒有關(guān)閉!';  
          }
        }
      }
     
      //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:包含文件出錯!';
          }
          $this->_tpl = preg_replace($_pattenInclude,"<&#63;php include '$1';&#63;>",$this->_tpl);
        }
      }
     
      //解析系統(tǒng)變量方法
      private function parConfig(){
        $_pattenConfig = '/<!--\s+\{([\w]+)\}\s+-->/';
        if (preg_match($_pattenConfig,$this->_tpl)) {
          $this->_tpl = preg_replace($_pattenConfig,"<&#63;php echo \$this->_config['$1'];&#63;>",$this->_tpl);
        }
      }
      // 對外公共方法
      public function compile($_path)
      {
        // 解析模版文件
        $this->parvar();
        $this->parif();
        $this->parForeach();
        $this->parInclude();
        $this->parCommon();
        $this->parConfig();
        // 生成編譯文件
        if (! file_put_contents($_path, $this->_tpl)) {
          exit('ERROR:編譯文件生成錯誤!');
        }
      }
    }
    &#63;>
    
    

    Templates.class.php

    <&#63;php
     
    /**
     * 模版類
     */
    class Templates
    {
      //注入變量
      private $_vars = array();
      //保存系統(tǒng)變量數(shù)組字段
      private $_config = array();
      //創(chuàng)建一個構(gòu)造方法,來檢測各個目錄是否存在
      public function __construct()
      {
        if (! is_dir(TPL_DIR) || ! is_dir(TPL_C_DIR) || ! is_dir(CACHE) || !is_dir(CONFIG)) {
          echo 'ERROR:模版目錄或編譯目錄,緩存目錄不存在!自動創(chuàng)建!'."<br />";
          if (!is_dir(TPL_DIR)) {
            mkdir(TPL_DIR);
            echo '模版目錄'.TPL_DIR.'建立'."<br />";
          }
          if (!is_dir(TPL_C_DIR)) {
            mkdir(TPL_C_DIR);
            echo '編譯目錄'.TPL_C_DIR.'建立'."<br />";
          }
          if (!is_dir(CACHE)) {
            mkdir(CACHE);
            echo '緩存目錄'.CACHE.'建立'."<br />";
          }
          if (!is_dir(CONFIG)) {
            mkdir(CONFIG);
            echo '緩存目錄'.CONFIG.'建立'."<br />";
          }
          exit();
        }
        //保存系統(tǒng)變量
        $_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,用于注入變量
      public function assign($_var,$_value){
        //$_var用于同步模版里的變量名
        //$_value表示值
        if (isset($_var)&&!empty($_var)) {
          $this->_vars[$_var] = $_value;
        }else{
          exit('ERROR:設(shè)置模版變量!');
        }
     
      }
     
      //display()方法
      public function display($_file)
      {
        $_tplFile = TPL_DIR . $_file;
        // 判斷文件是否存在
        if (! file_exists($_tplFile)) {
          echo 'ERROR:模版文件不存在!自動創(chuàng)建Index.tpl模版文件!';
          file_put_contents($_tplFile,'Index');
          exit();
        }
     
        //生成編譯文件
        $_path = TPL_C_DIR.md5($_file).'-'.$_file.'.php';
        //緩存文件
        $_cacheFile = CACHE.md5($_file).'-'.$_file.'.html';
        //當(dāng)?shù)诙芜\行相同文件,直接載入緩存文件
        if (IS_CACHE) {
          //判斷緩存文件和編譯文件都存在
          if (file_exists($_cacheFile)&&file_exists($_path)) {
            //判斷模版文件是否修改過
            if (filemtime($_path)>=filemtime($_tplFile)&&filemtime($_cacheFile)>=filemtime($_path)) {
              include $_cacheFile;
              echo '<!--cache-->';
              return;
            }
          }
        }
        //當(dāng)編譯文件不存在或者文件發(fā)生改變則重新生成
        if (!file_exists($_path)||filemtime($_path)<filemtime($_tplFile)) {
          require ROOT_PATH.'/Class/parser.class.php';
          //構(gòu)造方法是傳入模版文件地址
          $_parser = new Parser($_tplFile);
          //傳入編譯文件地址
          $_parser->compile($_path);
        }
        //載入編譯文件
        include $_path;
        if (IS_CACHE) {
          //獲取緩沖區(qū)數(shù)據(jù)
          file_put_contents($_cacheFile,ob_get_contents());
          //清楚緩沖區(qū)
          ob_end_clean();
          //載入緩存文件
          include $_cacheFile;
        }
      }
    }
    &#63;>
    
    

    templates.php

    <&#63;php
    //設(shè)置字符編碼UTF-8
    header('Content-Type:text/html;charset=utf-8');
     
    //網(wǎng)站根目錄
    define('ROOT_PATH',dirname(__FILE__));
     
    //存放模版文件夾
    define('TPL_DIR',ROOT_PATH.'/Templates/');
     
    //編譯文件夾
    define('TPL_C_DIR',ROOT_PATH.'/Templates_c/');
     
    //緩存文件夾
    define('CACHE',ROOT_PATH.'/Cache/');
     
    //系統(tǒng)變量配置目錄
    define('CONFIG',ROOT_PATH.'/Config/');
     
    //是否開啟緩沖區(qū)
    define('IS_CACHE',false);//false
     
    //判斷是否需要開啟
    IS_CACHE &#63; ob_start() : null;
     
    //引入模版類
    require ROOT_PATH.'/Class/Templates.class.php';
     
    //實例化模版類
    $_tpl=new Templates();
     
    $_tpl->display('index.tpl');
    &#63;>
    
    

    templates/index.tpl

    <!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注釋{#} -->
    <!-- {if $a} -->
    123
    <!-- {else} -->
    321
    <!-- {/if} -->
    <br />
    <!-- {foreach $array(key,value)} -->
      <!-- {@key} -->...<!-- {@value} --><br />
    <!-- {/foreach} -->
    系統(tǒng)變量<!-- {WebName} --><br />
    普通變量<!-- {$name} --><br />
    
      <script src="/js/jquery-2.2.1.min.js" type="text/javascript"></script>
      <script src="/js/bootstrap.min.js" type="text/javascript"></script>
      <script type="text/javascript">
      </script>
    </body>
    </html>
    
    

    config/config.xml

    <&#63;xml version="1.0" encoding="UTF-8"&#63;>
    <root>
      <taglib>
        <name>WebName</name>
        <value>XXX網(wǎng)站</value>
      </taglib>
    </root>
    

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