Silently and simply wrote a template engine_PHP tutorial

/**
* An OOP template engine developed by Momo based on Discuz template engine, which can support template caching and generate hash md5 values.由hash值来判断模板是否被修改，假如被修改则重新生成缓存文件，假如没有被修改，则直接调用缓存文件.
* 版本:1.0.0.1 beta 测试版
*/
class mmtp{

var $left_tags="{";
var $right_tags="}";
var $tp_suffix=".html";
var $cache_suffix=".tpl";
var $tp_dir="./";
var $cache_dir="./";

/**
* 允许循环嵌套的次数，默认为5
*
* @var unknown_type
*/
var $nest = 5;
/**
* 模板路径
*
* @param unknown_type $tp_dir
* @return mmtp
*/

function __setdir($tp_dir){
if(file_exists($tp_dir)){
$this->tp_dir=$tp_dir; 
                        }else{ 
                                $this->error("模板路径不存在"); 
                        } 
        } 

        /** 
         * 设置缓存目录 
         * 
         * @param unknown_type $cache_dir 
         */ 
        function __setcdir($cache_dir){ 
                                if(file_exists($cache_dir)){ 
                                $this->cache_dir=$cache_dir; 
                        }else{ 
                                $this->error("缓存路径不存在"); 
                        } 
        } 

    /** 
     * 输出错误信息 
     * 
     * @param unknown_type $msg 
     */ 

        function error($msg){ 
                print ""; 
        } 

        /**                                                                                      */ 

        function tp($file){ 
                $tp_path=$this->tp_dir.$file.$this->tp_suffix; 
                $fp=fopen($tp_path,"rb"); 
                if(!$this->file_test($tp_path,"r") && !$this->match_hash($file)){ 
                        $template=$this->file_read($tp_path); 

                    $var_regexp = "((\$[a-zA-Z_x7f-xff][a-zA-Z0-9_x7f-xff]*)([[a-zA-Z0-9_-."'[]$x7f-xff]+])*)"; 
                    $const_regexp = "([a-zA-Z_x7f-xff][a-zA-Z0-9_x7f-xff]*)"; 
                        $template = preg_replace("/([nr]+)t+/s", "\1", $template); 
                        $template = preg_replace("//s", "{\1}", $template); 
                        $template = preg_replace("/{langs+(.+?)}/ies", "languagevar('\1')", $template); 
                        $template = str_replace("{LF}", "", $template); 

                        $template = preg_replace("/{(\$[a-zA-Z0-9_[]'"$.x7f-xff]+)}/s", "", $template); 
                        $template = preg_replace("/$var_regexp/es", "$this->addquote('')", $template); 
                        $template = preg_replace("/?>/es", "$this->addquote('')", $template); 

                         
                        $template = preg_replace("/[nrt]*{templates+([a-z0-9_]+)}[nrt]*/is", "ncache_dir."\1".$this->cache_suffix."'); ?>n", $template); 
                        $template = preg_replace("/[nrt]*{templates+(.+?)}[nrt]*/is", "ncache_dir."\1".$$this->cache_suffix."'); ?>n", $template); 
                        $template = preg_replace("/[nrt]*{evals+(.+?)}[nrt]*/ies", "$this->stripvtags('nn','')", $template); 
                        $template = preg_replace("/[nrt]*{echos+(.+?)}[nrt]*/ies", "$this->stripvtags('nn','')", $template); 
                        $template = preg_replace("/[nrt]*{elseifs+(.+?)}[nrt]*/ies", "$this->stripvtags('nn','')", $template); 
                        $template = preg_replace("/[nrt]*{else}[nrt]*/is", "nn", $template); 

                        for($i = 0; $i < $this->nest; $i++) { 
                        $template = preg_replace("/[nrt]*{loops+(S+)s+(S+)}[nr]*(.+?)[nr]*{/loop}[nrt]*/ies", "$this->stripvtags('n','n\3nn')", $template); 
                        $template = preg_replace("/[nrt]*{loops+(S+)s+(S+)s+(S+)}[nrt]*(.+?)[nrt]*{/loop}[nrt]*/ies", "$this->stripvtags('n \3) { ?>','n\4nn')", $template); 
                        $template = preg_replace("/[nrt]*{ifs+(.+?)}[nr]*(.+?)[nr]*{/if}[nrt]*/ies", "$this->stripvtags('n','n\2nn')", $template); 
                        } 

                        $template = preg_replace("/{$const_regexp}/s", "", $template); 
                        $template = preg_replace("/ ?>[nr]*                        $hash=$this->file_hash($tp_path); 
                        $head_hash=""; 
                        $foot_time=""; 
                        $this->file_write($this->cache_dir.$file.".tpl",$head_hash.$template.$foot_time); 

                         

                } 
        } 

         
        /**
* Check if the file exists and has read permissions
* *
* @param unknown_type $path
*/ 

        function file_test($path,$method){ 
                if(!file_exists($path) || !fopen($path,$method)){ 
                        $this->error("模板文件不存在,或没有操作权限"); 
                        return false; 
                } 
        } 

        /**                                                                         */ 
        function file_read($path,$length=0){ 
                if(!$this->file_test($path,"r+")){ 
                $fp=@fopen($path,"r+"); 
                if($length==0){ 
                        $contents=@fread($fp,filesize($path)); 
                }else{ 
                        $contents=@fread($fp,$length); 
                } 
                fclose($fp); 
                return $contents; 
                } 
        } 

         
        /**
*Write file content
*/ 
        function file_write($path,$puts){ 

                if(!$this->file_test($path,"w+")){ 
                $fp=@fopen($path,"w+"); 
                @fwrite($fp,$puts); 
                fclose($fp); 
                } 

        } 

         
        /**                                                                       */ 
        function file_hash($path){ 
                return md5_file($path); 
        } 

         
        /**                                                                                   */ 
        function match_hash($file){ 
                $read_hash=$this->file_read($this->cache_dir.$file.$this->cache_suffix,46); 

                $html_hash=$this->file_hash($this->tp_dir.$file.$this->tp_suffix); 

                        if(preg_match("/".$html_hash."/i",$read_hash)){ 
                        return true; 
                } 

        } 

        function addquote($var) { 
        return str_replace("\"", """, preg_replace("/[([a-zA-Z0-9_-.x7f-xff]+)]/s", "['\1']", $var)); 
        } 

        function transamp($str) { 
        $str = str_replace('&', '&', $str); 
        $str = str_replace('&', '&', $str); 
        $str = str_replace('"', '"', $str); 
        return $str; 
} 

        function stripvtags($expr, $statement) { 
        $expr = str_replace("\"", """, preg_replace("//s", "\1", $expr)); 
        $statement = str_replace("\"", """, $statement); 
        return $expr.$statement; 
} 

} 


$tp=new mmtp(); 
$tp->__setdir("./"); 
$tp->__setcdir("./cache/"); 
$tp->tp("index1"); 
$_GET[it]=sdhkadajksdhajdhkajsdhjkasdjkasdhasjdhkjsadhk; 
$name=2; 
$head="欢迎使用MoMo模板引擎"; 
include("./cache/index1.tpl"); 
?> 




模板index.html 



复制代码

{template index}