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一个编译型的PHP模板引擎大致实现过程

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Release: 2016-06-13 10:50:38
Original
894 people have browsed it

JTemplate.class.php

001
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/**
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 * @author  Jiawei
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 * @Completed in 2012-6-29 0:23
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 */
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class JTemplate{
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    //通过assign函数传入的变量临时存放数组
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    private $templateVar = array();
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    //模板目录
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    private $templateDir = '';
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    //编译目录
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    private $templateCompileDir = '';
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    private $fileName = '';
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    /**
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     * 构造函数
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     * @param string $templateDir 模板目录
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     * @param string $templateComplieDir 模板编译目录
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     */
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    public function __construct($templateDir,$templateComplieDir){
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        $this->templateDir = $templateDir;
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        $this->templateCompileDir = $templateComplieDir;
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    }
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    /**
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     * 显示模板
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     * @param string $fileName 模板文件名
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     */
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    public function display($fileName){
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        $this->fileName = $fileName;
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        if(file_exists($this->templateDir.'/'.$this->fileName)){
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            $compileFileName = $this->templateCompileDir.'/'.$this->file_safe_name().'.php';
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            if(!file_exists($compileFileName) || filemtime($compileFileName)templateDir.'/'.$this->fileName)){
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                $this->del_old_file();
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                $this->compile();
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            }
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            extract($this->templateVar);
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            include $compileFileName;
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        }else{
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            $this->error('Sorry,the template file '.$this->fileName.' does not exist!!');
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        }
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    }
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    /**
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     * 获取编译文件名
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     */
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    private function get_compile_file(){
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        $compileFile = explode('.',$this->fileName);
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        unset($compileFile[count($compileFile)-1]);
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        return implode('.',$compileFile);
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    }
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    /**
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     * 编译
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     */
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    private function compile(){
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        $fileHandle = @fopen($this->templateDir.'/'.$this->fileName, 'r');
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        while(!feof($fileHandle)){
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            $fileContent = fread($fileHandle,1024);
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        }
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        fclose($fileHandle);
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        $fileContent = $this->template_replace($fileContent);
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        //$compileFile = $this->get_compile_file($fileName);
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        $fileHandle = @fopen($this->templateCompileDir.'/'.$this->file_safe_name().'.php','w');
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        if($fileHandle){
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            fwrite($fileHandle, $fileContent);
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            fclose($fileHandle);
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        }else{
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            $this->error('Sorry,Compile dir can not write!');
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        }
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    }
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    /**
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     * 模板传值
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     * @param string $valueName 模板中使用的变量名
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     * @param $value 变量值
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     */
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    public function assign($valueName,$value){
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        $this->templateVar[$valueName] = $value;
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    }
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    /**
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     * 模板正则替换
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     * @param string $content 替换内容
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     * @return  string 替换过后的内容
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     */
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    private function template_replace($content){
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        $orginArray = array(
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            '//s',
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            '//s',
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            '/(.+?)/s',
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            '//s',
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            '//s',
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            '//s',
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            '//s',
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            '//s',
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            '/\{P:(.+?)\:}/s',
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            '/\{C:(\w+)\}/s',
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            '/\{I:(.+?)\}/s',
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            '/\{F:(.+?)\}/s',
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            '/\{EF:(.+?)\}/s',
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            '/\{([a-zA-Z0-9_\[\]\'\"\$\.\x7f-\xff]+)\}/s',
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        );
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        $changeArray = array(
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            '',
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            '$$3){$countLoop++;?>',
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            '$1',
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            '',
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            '',
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            '',
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            '',
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            '',
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            '',
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            '',
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            'templateDir.'/$1";?>',
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            '',
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            '',
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            '',
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        );
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        return $repContent=preg_replace($orginArray,$changeArray,$content);
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    }
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    /**
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     * 删除旧文件
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     */
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    private function del_old_file(){
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        $compileFile = $this->get_compile_file($this->fileName);
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        $files = glob($this->templateCompileDir.'/'.$compileFile.'*.php');
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        // print_r($files);
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        if($files){
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            @unlink($files[0]);
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        }
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    }
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    /**
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     * 编译文件名安全处理方法
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     * @return  string 返回编译文件名
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     */
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    private function file_safe_name(){
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        $compileFile = $this->get_compile_file($this->fileName);
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        return $compileFile.filemtime($this->templateDir.'/'.$this->fileName);
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    }
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    /**
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     * 错误输出函数
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     * @param string $content 错误输出信息
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     */
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    private function error($content){
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        $stringHtml = '

';
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        $stringHtml .= 'Error information:
';
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        $stringHtml .= '';
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        $stringHtml .= $content;
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        $stringHtml .= '
';
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        $stringHtml .= '
';
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        exit($stringHtml);
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    }
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}
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?>
index.php

view sourceprint?
01
02
/**
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 * @author Jiawei
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 */
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include_once 'JTemplate/JTemplate.class.php';
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$template = new JTemplate('template','compile');
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$a = array('a','b','c','d');
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define('_CORE_','aaa');
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$template->assign('a', $a);
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$template->display('index.html');
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?>
 作者:袁家伟

source:php.cn
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