简单的自定义php模板引擎

class CompileClass {
 private $template;  // 待编译文件
 private $content;  // 需要替换的文本
 private $compile_file;  // 编译后的文件
 private $left = '{';  // 左定界符
 private $right = '}';  // 右定界符
 private $include_file = array();  // 引入的文件
 private $config;  // 模板的配置文件
 private $T_P = array();  // 需要替换的表达式
 private $T_R = array();  // 替换后的字符串
 
 public function __construct($template, $compile_file, $config) {}
 
 public function compile() {
  $this->c_include();
  $this->c_var();
  $this->c_staticFile();
  file_put_contents($this->compile_file, $this->content);
 }
 
 // 处理include
 public function c_include() {}
 
 // 处理各种赋值和基本语句
 public function c_var() {}
 
 // 对静态的JavaScript进行解析 
 public function c_staticFile() {}
}

// 需要替换的正则表达式
$this->T_P[] = "/$this->left\s*\\$([a-zA-Z_\x7f-\xff][a-zA-Z0-9_\xf7-\xff]*)\s*$this->right/";
$this->T_P[] = "/$this->left\s*(loop|foreach)\s*\\$([a-zA-Z_\x7f-\xff][a-zA-Z0-9_\xf7-\xff]*)\s*$this->right/";
$this->T_P[] = "/$this->left\s*(loop|foreach)\s*\\$([a-zA-Z_\x7f-\xff][a-zA-Z0-9_\xf7-\xff]*)\s "
  . "as\s \\$([a-zA-Z_\x7f-\xff][a-zA-Z0-9_\xf7-\xff]*)$this->right/";
$this->T_P[] = "/$this->left\s*\/(loop|foreach|if)\s*$this->right/";
$this->T_P[] = "/$this->left\s*if(.*?)\s*$this->right/";
$this->T_P[] = "/$this->left\s*(else if|elseif)(.*?)\s*$this->right/";
$this->T_P[] = "/$this->left\s*else\s*$this->right/";
$this->T_P[] = "/$this->left\s*([a-zA-Z_\x7f-\xff][a-zA-Z0-9_\xf7-\xff]*)\s*$this->right/";

// 替换后的字符串   
$this->T_R[] = "<?php echo \$\\1; ?>";
$this->T_R[] = "<?php foreach((array)\$\\2 as \$K=>\$V) { ?>";
$this->T_R[] = "<?php foreach((array)\$\\2 as &\$\\3) { ?>";
$this->T_R[] = "<?php } ?>";
$this->T_R[] = "<?php if(\\1) { ?>";
$this->T_R[] = "<?php } elseif(\\2) { ?>";
$this->T_R[] = "<?php } else { ?>";
$this->T_R[] = "<?php echo \$\\1; ?>";

<!--模板文件-->
{$data}
{foreach $vars}
 {if $V == 1 }
  <input value="{V}">
 {elseif $V == 2}
  <input value="123123">
 {else }
  <input value="sdfsas是aa">
 {/if}
{/foreach}

{ loop $vars as $var}
 <input value="{var}">
{ /loop }
 // 解析后
<?php echo $data; ?>
<?php foreach((array)$vars as $K=>$V) { ?>
 <?php if( $V == 1) { ?>
  <input value="<?php echo $V; ?>">
 <?php } elseif( $V == 2) { ?>
  <input value="123123">
 <?php } else { ?>
  <input value="sdfsas是aa">
 <?php } ?>
<?php } ?>

<?php foreach((array)$vars as &$var) { ?>
 <input value="<?php echo $var; ?>">
<?php } ?>

class Template {
 // 配置数组 
 private $_arrayConfig = array(
  'root' => '',  // 文件根目录
  'suffix' => '.html',  // 模板文件后缀
  'template_dir' => 'templates',  // 模板所在文件夹
  'compile_dir' => 'templates_c',  // 编译后存放的文件夹
  'cache_dir' => 'cache',  // 静态html存放地址
  'cache_htm' => false,  // 是否编译为静态html文件
  'suffix_cache' => '.htm',  // 设置编译文件的后缀
  'cache_time' => 7200,  // 自动更新间隔
  'php_turn' => true,  // 是否支持原生php代码
  'debug' => 'false',
 );
 private $_value = array();  
 private $_compileTool;  // 编译器
 static private $_instance = null;  
 public $file;  // 模板文件名
 public $debug = array();  // 调试信息
 
 public function __construct($array_config=array()) {}
 
 // 单步设置配置文件
 public function setConfig($key, $value=null) {}
 
 // 注入单个变量
 public function assign($key, $value) {}
 
 // 注入数组变量
 public function assignArray($array) {}
 
 // 是否开启缓存
 public function needCache() {}
 
 // 如果需要重新编译文件
 public function reCache() {}
 
 // 显示模板
 public function show($file) {}
 
}
 

public function show($file) {
 $this->file = $file;
 if(!is_file($this->path())) {
  exit("找不到对应的模板文件");
 }

 $compile_file = $this->_arrayConfig['compile_dir']. md5($file). '.php';
 $cache_file = $this->_arrayConfig['cache_dir']. md5($file). $this->_arrayConfig['suffix_cache'];

 // 如果需要重新编译文件
 if($this->reCache($file) === false) {
  $this->_compileTool = new CompileClass($this->path(), $compile_file, $this->_arrayConfig);

  if($this->needCache()) {
   // 输出到缓冲区
   ob_start();
  }
  // 将赋值的变量导入当前符号表
  extract($this->_value, EXTR_OVERWRITE);

  if(!is_file($compile_file) or filemtime($compile_file) < filemtime($this->path())) {
   $this->_compileTool->vars = $this->_value;
   $this->_compileTool->compile();
   include($compile_file);
  }
  else {
   include($compile_file);
  }

  // 如果需要编译成静态文件
  if($this->needCache() === true) {
   $message = ob_get_contents();
   file_put_contents($cache_file, $message);
  }
 }
 else {
  readfile($cache_file);
 }
}

require('Template.php');

$config = array(
 'debug' => true,
 'cache_htm' => false,
 'debug' => true
);

$tpl = new Template($config);
$tpl->assign('data', microtime(true));
$tpl->assign('vars', array(1,2,3));
$tpl->assign('title', "hhhh");
$tpl->show('test');

<!DOCTYPE html>
<html>
 <head>
  <title>hhhh</title>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
 </head>
 <body>
  1466525760.32         <input value="1">
            <input value="123123">
            <input value="sdfsas是aa">
       
     <input value="1">
     <input value="2">
     <input value="3">
    <script src="123?t=1465898652"></script>
 </body>
</html>