PHP模版引擎原理、定义与用法实例


						本文实例讲述了PHP模版引擎原理、定义与用法。分享给大家供大家参考，具体如下：

template存放模版源文件

模版编译工具类

Compline.class.php





<?php

/**

* 模板编译工具类

*/

class Compile

{

  private $template;     //带编译文件

  private $content;      //需要替换的文本

  private $comfile;      //编译后的文件

  private $left = '{';     //左界定符

  private $right = '}';    //右界定符

  private $value = array();   //值栈

  private $php_turn;

  private $T_P = array();

  private $T_R = array();

  public function __construct($template, $compileFile, $config)

  {

   $this->template = $template;

   $this->comfile = $compileFile;

   $this->content = file_get_contents($template);

   if($config['php_turn'] === false)

   {

     $this->T_P[] = "/<\?(=|php|)(.+?)\?>/is";

     $this->T_R[] = "<? \\1\\2? &gt";

   }

   //{$var}

   $this->T_P[] = "/\{\\$([a-zA-Z_\x7f-\xff][a-zA-Z0-9_\x7f-\xff]*)\}/";

   //{foreach $b}或者{loop $b}

   $this->T_P[] = "/\{(loop|foreach) \\$([a-zA-Z_\x7f-\xff][a-zA-Z0-9_\x7f-\xff]*)\}/i";

   //{[K|V]}

   $this->T_P[] = "/\{([K|V])\}/";

   //{/foreach}或者{\loop}或者{\if}

   $this->T_P[] = "/\{\/(loop|foreach|if)}/i";

   //{if (condition)}

   $this->T_P[] = "/\{if (.* ?)\}/i";

   //{(else if | elseif)}

   $this->T_P[] = "/\{(else if|elseif) (.* ?)\}/i";

   //{else}

   $this->T_P[] = "/\{else\}/i";

   //{#...# 或者 *...#，注释}

   $this->T_P[] = "/\{(\#|\*)(.* ?)(\#|\*)\}/";

   $this->T_R[] = "<?php echo \$this->value['\\1']; ?>";

   $this->T_R[] = "<?php foreach ((array)\$this->value['\\2'] as \$K => \$V) { ?>";

   $this->T_R[] = "<?php echo \$\\1; ?>";

   $this->T_R[] = "<?php } ?>";

   $this->T_R[] = "<?php if (\\1) { ?>";

   $this->T_R[] = "<?php }else if (\\2) { ?>";

   $this->T_R[] = "<?php }else{ ?>";

   $this->T_R[] = "";

  }

  public function compile()

  {

   $this->c_all();

   $this->c_staticFile();

   file_put_contents($this->comfile, $this->content);

  }

  public function c_all()

  {

   $this->content = preg_replace($this->T_P, $this->T_R, $this->content);

  }

  /**

  * 加入对JavaScript文件的解析

  * @return [type] [description]

  */

  public function c_staticFile()

  {

   $this->content = preg_replace('/\{\!(.* ?)\!\}/', '<script src=\\1'.'?t='.time().'></script>', $this->content);

  }

  public function __set($name, $value)

  {

   $this->$name = $value;

  }

  public function __get($name)

  {

   if(isset($this->$name))

   {

     return $this->$name;

   }

   else

   {

     return null;

   }

  }

}







Template.class.php







<?php

/**

* Template

*/

class Template

{

  private $arrayConfig = array(

   'suffix'   => '.tpl',  //模板的后缀

   'templateDir' => 'template/', //模板所在的文件夹

   'compileDir'  => 'cache/',  //编译后存放的目录

   'cache_html'  => true,   //是否需要编译成静态的html文件

   'suffix_cache' => '.html',  //设置编译文件的后缀

   'cache_time'  => 7200,   //设置多长时间自动更新

   'php_turn'  => true,   //设置是否支持php原生代码

   'debug'     => false,

   );

  public $file;         //模板文件名,不带路径

  public $debug = array();     //调试信息

  private $value = array();    //值栈

  private $compileTool;      //编译器

  private $controlData = array();

  static private $instance = null;  //模板类对象

  public function __construct($arrayConfig = array())

  {

   $this->debug['begin'] = microtime(true);

   $this->arrayConfig = array_merge($this->arrayConfig, $arrayConfig);

   $this->getPath();

   if(!is_dir($this->arrayConfig['templateDir']))

   {

     exit("template dir isn't found!");

   }

   if(!is_dir($this->arrayConfig['compileDir']))

   {

     if(strtoupper(substr(PHP_OS,0,3)) === 'WIN')

     {

      mkdir($this->arrayConfig['compileDir']);

     }

     else

     {

      mkdir($this->arrayConfig['compileDir'], 0770, true);

     }

   }

   include('Compile.class.php');

  }

  public function getPath()

  {

   $this->arrayConfig['templateDir'] = strstr(realpath($this->arrayConfig['templateDir']), '\\', '/').'/';

   $this->arrayConfig['compileDir'] = strstr(realpath($this->arrayConfig['compileDir'])), '\\', '/').'/';

  }

  /**

  * 取得模板引擎的实例

  */

  public static function getInstance()

  {

   if(is_null(self::$instance))

   {

     self::$instance = new Template();

   }

   return self::$instance;

  }

  /**

  * 单独设置引擎参数

  * 也支持一次性设置多个参数

  */

  public function setConfig($key, $value = null)

  {

   if(is_array($key))

   {

     $this->arrayConfig = $key + $this->arrayConfig;

   }

   else

   {

     $this->arrayConfig[$key] = $value;

   }

  }

  /**

  * 获取当前模板引擎配置，仅供调试使用

  */

  public function getConfig($key = null)

  {

   if($key && array_key_exists($key, $this->arrayConfig))

   {

     return $this->arrayConfig[$key];

   }

   else

   {

     return $this->arrayConfig;

   }

  }

  /**

  * 注入单个变量

  */

  public function assign($key, $value)

  {

   $this->value[$key] = $value;

  }

  /**

  * 注入数组变量

  */

  public function assignArray($array)

  {

   if(is_array($array))

   {

     foreach ($array as $k => $v) {

      $this->value[$k] = $v;

     }

   }

  }

  /**

  * 获取模板的位置

  * @return [type] [description]

  */

  public function path()

  {

   return $this->arrayConfig['templateDir'].$this->file.$this->arrayConfig['suffix'];

  }

  /**

  * 判断配置文件是否要求缓存

  */

  public function needCache()

  {

   return $this->arrayConfig['cache_html'];

  }

  /**

  * 判断是否需要缓存

  */

  public function reCache($file)

  {

   $flag = false;

   $cacheFile = $this->arrayConfig['compileDir'].md5($file).$this->arrayConfig['suffix_cache'];

   if($this->arrayConfig['cache_html'] === true)

   {

     //需要缓存

     $timeFlag = (time() - @filemtime($cacheFile)) < $this->arrayConfig['cache_time'] ? true : false;

     if(is_file($cacheFile) && filesize($cacheFile) > 1 && $timeFlag)

     {

      //缓存存在且未过期

      $flag = true;

     }

     else

     {

      $flag = false;

     }

   }

   return $flag;

  }

  /**

  * 展示模板

  */

  public function show($file)

  {

   $this->file = $file;

   if(!is_file($this->path()))

   {

     exit('找不到对应的模板');

   }

   $compileFile = $this->arrayConfig['compileDir'].md5($file).'.php';

   $cacheFile = $this->arrayConfig['compileDir'].md5($file).$this->arrayConfig['suffix_cache'];

   if($this->reCache($file) === false)

   {

     //如果需要缓存

     $this->debug['cached'] = 'false';

     $this->compileTool = new Compile($this->path(), $compileFile, $this->arrayConfig);

     if($this->needCache())

     {

      ob_start();

     }

     extract($this->value, EXTR_OVERWRITE);

     if(!is_file($compileFile) || fileatime($compileFile) < filemtime($this->path()))

     {

      $this->compileTool->value = $this->value;

      $this->compileTool->compile();

      include $compileFile;

     }

     else

     {

      include $compileFile;

     }

     if($this->needCache())

     {

      $message = ob_get_contents();

      file_put_contents($cacheFile, $message);

     }

   }

   else

   {

     readfile($cacheFile);

     $this->debug['cached'] = 'true';

   }

   $this->debug['spend'] = microtime(true) - $this->debug['begin'];

   $this->debug['count'] = count($this->value);

   $this->debug_info();

  }

  public function debug_info()

  {

   if($this->arrayConfig['debug'] === true)

   {

     echo "<br/>", '-------------------- debug_info--------------', "<br/>";

     echo '程序运行日期:', date("Y-m-d h:i:s"), "<br/>";

     echo '模板解析耗时:', $this->debug['spend'], '秒', "<br/>";

     echo '模板包含标签数目:', $this->debug['count'], "<br/>";

     echo '是否使用静态缓存:', $this->debug['cached'], "<br/>";

     echo '模板引擎实例参数:', var_dump($this->getConfig());

   }

  }

  /**

  * 清楚缓存的html文件

  * @return [type] [description]

  */

  public function clean()

  {

   if($path === null)

   {

     $path = $this->arrayConfig['compileDir'];

     $path = glob($path.'* '.$this->arrayConfig['suffix_cache']);

   }

   else

   {

     $path = $this->arrayConfig['compileDir'].md5($path).$this->arrayConfig['suffix_cache'];

   }

   foreach ((array)$path as $v) {

     unlink($v);

   }

  }

}





test.php





<?php

include 'Template.class.php';

$tpl = new Template(array('debug' => true));

$tpl->assign('data', 'hello world');

$tpl->assign('person', 'htGod');

$tpl->assign('data1', 3);

$arr = array(1,2,3,4,'5',6);

$tpl->assign('b', $arr);

$tpl->show('member');







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