PHP模版引擎原理、定义与用法实例
发布:smiling 来源: PHP粉丝网 添加日期:2021-11-14 12:38:46 浏览: 评论:0
这篇文章主要介绍了PHP模版引擎原理、定义与用法,结合实例形式分析了php模板引擎相关的模板编译、缓存处理、变量替换等操作技巧,需要的朋友可以参考下。
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";
- $this->T_R[] = "<? \\1\\2? >";
- }
- //{$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');
Tags: PHP模版引擎 PHP模版定义
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