<?php /** * 模版引擎类 */ class Tpl { //缓存目录 protected $cacheDir = ‘./Cache/‘; //模版目录 protected $tplDir = ‘./Tpl/‘; //保存变量的成员方法 protected $vars = []; //缓存有效期 protected $cacheLifeTime = 3600; //初始化成员属性 public function __construct($tplDir = null ,$cacheDir = null ,$cacheLifeTime = null) { //判断缓存目录是否存在 if (isset($tplDir)) { if ($this->_checkDir($tplDir)) { $this->tplDir = rtrim($tplDir,‘/‘) . ‘/‘; } } //判断模板路径是否存在 如果不存在要创建,权限是否可写 就需要更改权限 if (isset($cacheDir)) { if ($this->_checkDir($cacheDir)) { $this->tplDir = rtrim($cacheDir,‘/‘) . ‘/‘; } } //初始化缓存时间 if (isset($cacheLifeTime)) { $thsi->cacheLifeTime = $cacheLifeTime; } } //目录的创建以及权限的处理 private function _checkDir($path) { //判断是否存在目录以及是否是目录 if (!file_exists($path) || !is_dir($path)) { return mkdir($path,0755,true); } //判断目录的权限是否可读可写 if (!is_readable($path) || !is_writable($path)) { return chmod($path,0755); } return true; } //分配变量 主要的目的是将模板中需要处理的代码在php中替换做准备 public function assign($key,$val) { $this->vars[$key] = $val; } //display 显示模板文件 public function display($file,$isExecute = true ,$uri = null) { //获得模板路径(模板目录路径+模板文件) $tplFilePath = $this->tplDir.$file; //判断文件是否存在 if (!file_exists($tplFilePath)) { exit(‘模板文件不存在‘); } //获得编译文件路径(组合一个全新的文件名和路径) $cacheFile = md5($file.$uri) . ‘.php‘; $cacheFilePath = $this->cacheDir . $cacheFile; //检测是否编译过 是否修改过模板文件 如果变编译过 而且在有效期内则不编译 if (!file_exists($cacheFilePath)) { $html = $this->compile($tplFilePath); } else { //如果修改过模版文件 就需要删除原来的编译文件重新编译 if (filemtime($tplFilePath) > filemtime($cacheFilePath)) { //删除原来的文件 unlink($cacheFilePath); //重新编译 $html = $this->compile($tplFilePath); } //文件创建时间+缓存有效期 > time() [当前时间], 没有过期 否则过期 $isTimeout = (filemtime($tplFilePath) + $this->cacheLifeTime > time()) ? false : true; if ($isTimeout) { $html = $this->compile($tplFilePath); } } //编译 if (isset($html)) { if (!file_put_contents($cacheFilePath, $html)) { exit(‘编译文件写入失败‘); } } //执行 if ($isExecute) { extract($this->vars); include $cacheFilePath; } } //编译的方法 将html的php代码替换成php代码来执行 并且生成一个缓存 protected function compile($tplFilePath) { //将整个文件读入一个字符串 $html = file_get_contents($tplFilePath); //正则替换规则 $keys = [ ‘{if %%}‘ => ‘<?php if(\1): ?>‘, ‘{else}‘ => ‘<?php else : ?>‘, ‘{else if %%}‘ => ‘<?php elseif(\1) : ?>‘, ‘{elseif %%}‘ => ‘<?php elseif(\1) : ?>‘, ‘{/if}‘ => ‘<?php endif;?>‘, ‘{$%%}‘ => ‘<?=$\1;?>‘, ‘{foreach %%}‘ => ‘<?php foreach(\1) :?>‘, ‘{/foreach}‘ => ‘<?php endforeach;?>‘, ‘{for %%}‘ => ‘<?php for(\1):?>‘, ‘{/for}‘ => ‘<?php endfor;?>‘, ‘{while %%}‘ => ‘<?php while(\1):?>‘, ‘{/while}‘ => ‘<?php endwhile;?>‘, ‘{continue}‘ => ‘<?php continue;?>‘, ‘{break}‘ => ‘<?php break;?>‘, ‘{$%% = $%%}‘ => ‘<?php $\1 = $\2;?>‘, ‘{$%%++}‘ => ‘<?php $\1++;?>‘, ‘{$%%--}‘ => ‘<?php $\1--;?>‘, ‘{comment}‘ => ‘<?php /* ‘, ‘{/comment}‘ => ‘ */ ?>‘, ‘{/*}‘ => ‘<?php /* ‘, ‘{*/}‘ => ‘* ?>‘, ‘{section}‘ => ‘<?php ‘, ‘{/section}‘ => ‘?>‘, ‘{{%%(%%)}}‘ => ‘<?=\1(\2);?>‘, ‘{include %%}‘ => ‘<?php include "\1";?>‘, ]; //通过遍历 然后一一替换 foreach ($keys as $key => $value) { //正则匹配替换 $patten = ‘#‘ . str_replace(‘%%‘, ‘(.+)‘, preg_quote($key,‘#‘)) . ‘#imsU‘; $replace = $value; //包含文件处理 include处理方式不一样 if (stripos($patten, ‘include‘)) { // 执行一个正则表达式搜索并且使用一个回调进行替换 $html = preg_replace_callback($patten, array($this,‘parseInclude‘), $html); } else { $html = preg_replace($patten, $replace, $html); } } return $html; } protected function parseInclude($data) { $file = str_replace([‘\‘‘,‘"‘],‘‘,$data[1]); $path = $this->parsePath($file); $this->display($file,false); return ‘<?php include "‘ . $path . ‘";?>‘; } //处理文件名 将汉字符号等统一设置为32位的加密文件名 protected function parsePath($file) { $path = $this->cacheDir . md5($file).‘.php‘; return $path; } //删除缓存文件(递归) public function clearCache() { self::delDir($this->cacheDir); } //递归删除缓存的文件 public static function delDir($path) { $res = opendir($path); while($file = readdir($res)){ if ($file == ‘.‘ || $file == ‘..‘) { continue; } $newPath = $path.‘/‘.$file; if (is_dir($newPath)) { self::delDir($newpath); } else { unlink($newPath); } } } }
测试代码:
$tpl = new Tpl(); $tpl->assign(‘hello‘,‘world‘); $tpl->assign(‘chensen‘,‘你好森林么么哒‘); $tpl->display(‘index.html‘);
本文出自 “你好我是森林” 博客,请务必保留此出处http://chensenlin.blog.51cto.com/10559465/1855944
原文地址:http://chensenlin.blog.51cto.com/10559465/1855944