\n \n\n\n123\n\n321\n\n
\n\n ...
\n\n系統(tǒng)變量
\n普通變量
\n\n

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php制作簡單模版引擎,php模版引擎
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Home Backend Development PHP Tutorial Create a simple template engine in php, php template engine_PHP tutorial

Create a simple template engine in php, php template engine_PHP tutorial

Jul 12, 2016 am 08:54 AM
php template engine

php制作簡單模版引擎,php模版引擎

PHP模板引擎就是一個(gè)PHP類庫,使用它可以使PHP代碼和HTML代碼進(jìn)行分離,使代碼的可讀性和維護(hù)性得到顯著提高。而且這樣做的好處是,讓美工專心設(shè)計(jì)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(tuán)隊(duì)使用,使每個(gè)人都能發(fā)揮其特長

下面我們就來看看如何簡單的來實(shí)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(gè)構(gòu)造方法,來檢測各個(gè)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\(yùn)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(shí)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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