// +---------------------------------------------------------------------- namespace Think; /** * ThinkPHP内置模板引擎类 * 支持XML标签和普通标签的模板解析 * 编译型模板引擎 支持动态缓存 */ class Template { // 模板页面中引入的标签库列表 protected $tagLib = array(); // 当前模板文件 protected $templateFile = ''; // 模板变量 public $tVar = array(); public $config = array(); private $literal = array(); private $block = array(); /** * 架构函数 * @access public */ public function __construct(){ $this->config['cache_path'] = C('CACHE_PATH'); $this->config['template_suffix'] = C('TMPL_TEMPLATE_SUFFIX'); $this->config['cache_suffix'] = C('TMPL_CACHFILE_SUFFIX'); $this->config['tmpl_cache'] = C('TMPL_CACHE_ON'); $this->config['cache_time'] = C('TMPL_CACHE_TIME'); $this->config['taglib_begin'] = $this->stripPreg(C('TAGLIB_BEGIN')); $this->config['taglib_end'] = $this->stripPreg(C('TAGLIB_END')); $this->config['tmpl_begin'] = $this->stripPreg(C('TMPL_L_DELIM')); $this->config['tmpl_end'] = $this->stripPreg(C('TMPL_R_DELIM')); $this->config['default_tmpl'] = C('TEMPLATE_NAME'); $this->config['layout_item'] = C('TMPL_LAYOUT_ITEM'); } private function stripPreg($str) { return str_replace( array('{','}','(',')','|','[',']','-','+','*','.','^','?'), array('\{','\}','\(','\)','\|','\[','\]','\-','\+','\*','\.','\^','\?'), $str); } // 模板变量获取和设置 public function get($name) { if(isset($this->tVar[$name])) return $this->tVar[$name]; else return false; } public function set($name,$value) { $this->tVar[$name]= $value; } /** * 加载模板 * @access public * @param string $templateFile 模板文件 * @param array $templateVar 模板变量 * @param string $prefix 模板标识前缀 * @return void */ public function fetch($templateFile,$templateVar,$prefix='') { $this->tVar = $templateVar; $templateCacheFile = $this->loadTemplate($templateFile,$prefix); Storage::load($templateCacheFile,$this->tVar,null,'tpl'); } /** * 加载主模板并缓存 * @access public * @param string $templateFile 模板文件 * @param string $prefix 模板标识前缀 * @return string * @throws ThinkExecption */ public function loadTemplate ($templateFile,$prefix='') { if(is_file($templateFile)) { $this->templateFile = $templateFile; // 读取模板文件内容 $tmplContent = file_get_contents($templateFile); }else{ $tmplContent = $templateFile; } // 根据模版文件名定位缓存文件 $tmplCacheFile = $this->config['cache_path'].$prefix.md5($templateFile).$this->config['cache_suffix']; // 判断是否启用布局 if(C('LAYOUT_ON')) { if(false !== strpos($tmplContent,'{__NOLAYOUT__}')) { // 可以单独定义不使用布局 $tmplContent = str_replace('{__NOLAYOUT__}','',$tmplContent); }else{ // 替换布局的主体内容 $layoutFile = THEME_PATH.C('LAYOUT_NAME').$this->config['template_suffix']; // 检查布局文件 if(!is_file($layoutFile)) { E(L('_TEMPLATE_NOT_EXIST_').':'.$layoutFile); } $tmplContent = str_replace($this->config['layout_item'],$tmplContent,file_get_contents($layoutFile)); } } // 编译模板内容 $tmplContent = $this->compiler($tmplContent); Storage::put($tmplCacheFile,trim($tmplContent),'tpl'); return $tmplCacheFile; } /** * 编译模板文件内容 * @access protected * @param mixed $tmplContent 模板内容 * @return string */ protected function compiler($tmplContent) { //模板解析 $tmplContent = $this->parse($tmplContent); // 还原被替换的Literal标签 $tmplContent = preg_replace_callback('//is', array($this, 'restoreLiteral'), $tmplContent); // 添加安全代码 $tmplContent = ''.$tmplContent; // 优化生成的php代码 $tmplContent = str_replace('?>config['taglib_begin']; $end = $this->config['taglib_end']; // 检查include语法 $content = $this->parseInclude($content); // 检查PHP语法 $content = $this->parsePhp($content); // 首先替换literal标签内容 $content = preg_replace_callback('/'.$begin.'literal'.$end.'(.*?)'.$begin.'\/literal'.$end.'/is', array($this, 'parseLiteral'),$content); // 获取需要引入的标签库列表 // 标签库只需要定义一次,允许引入多个一次 // 一般放在文件的最前面 // 格式: // 当TAGLIB_LOAD配置为true时才会进行检测 if(C('TAGLIB_LOAD')) { $this->getIncludeTagLib($content); if(!empty($this->tagLib)) { // 对导入的TagLib进行解析 foreach($this->tagLib as $tagLibName) { $this->parseTagLib($tagLibName,$content); } } } // 预先加载的标签库 无需在每个模板中使用taglib标签加载 但必须使用标签库XML前缀 if(C('TAGLIB_PRE_LOAD')) { $tagLibs = explode(',',C('TAGLIB_PRE_LOAD')); foreach ($tagLibs as $tag){ $this->parseTagLib($tag,$content); } } // 内置标签库 无需使用taglib标签导入就可以使用 并且不需使用标签库XML前缀 $tagLibs = explode(',',C('TAGLIB_BUILD_IN')); foreach ($tagLibs as $tag){ $this->parseTagLib($tag,$content,true); } //解析普通模板标签 {$tagName} $content = preg_replace_callback('/('.$this->config['tmpl_begin'].')([^\d\w\s'.$this->config['tmpl_begin'].$this->config['tmpl_end'].'].+?)('.$this->config['tmpl_end'].')/is', array($this, 'parseTag'),$content); return $content; } // 检查PHP语法 protected function parsePhp($content) { if(ini_get('short_open_tag')){ // 开启短标签的情况要将'."\n", $content ); } // PHP语法检查 if(C('TMPL_DENY_PHP') && false !== strpos($content,'config['taglib_begin'].'layout\s(.+?)\s*?\/'.$this->config['taglib_end'].'/is',$content,$matches); if($find) { //替换Layout标签 $content = str_replace($matches[0],'',$content); //解析Layout标签 $array = $this->parseXmlAttrs($matches[1]); if(!C('LAYOUT_ON') || C('LAYOUT_NAME') !=$array['name'] ) { // 读取布局模板 $layoutFile = THEME_PATH.$array['name'].$this->config['template_suffix']; $replace = isset($array['replace'])?$array['replace']:$this->config['layout_item']; // 替换布局的主体内容 $content = str_replace($replace,$content,file_get_contents($layoutFile)); } }else{ $content = str_replace('{__NOLAYOUT__}','',$content); } return $content; } // 解析模板中的include标签 protected function parseInclude($content, $extend = true) { // 解析继承 if($extend) $content = $this->parseExtend($content); // 解析布局 $content = $this->parseLayout($content); // 读取模板中的include标签 $find = preg_match_all('/'.$this->config['taglib_begin'].'include\s(.+?)\s*?\/'.$this->config['taglib_end'].'/is',$content,$matches); if($find) { for($i=0;$i<$find;$i++) { $include = $matches[1][$i]; $array = $this->parseXmlAttrs($include); $file = $array['file']; unset($array['file']); $content = str_replace($matches[0][$i],$this->parseIncludeItem($file,$array,$extend),$content); } } return $content; } // 解析模板中的extend标签 protected function parseExtend($content) { $begin = $this->config['taglib_begin']; $end = $this->config['taglib_end']; // 读取模板中的继承标签 $find = preg_match('/'.$begin.'extend\s(.+?)\s*?\/'.$end.'/is',$content,$matches); if($find) { //替换extend标签 $content = str_replace($matches[0],'',$content); // 记录页面中的block标签 preg_replace_callback('/'.$begin.'block\sname=[\'"](.+?)[\'"]\s*?'.$end.'(.*?)'.$begin.'\/block'.$end.'/is', array($this, 'parseBlock'),$content); // 读取继承模板 $array = $this->parseXmlAttrs($matches[1]); $content = $this->parseTemplateName($array['name']); $content = $this->parseInclude($content, false); //对继承模板中的include进行分析 // 替换block标签 $content = $this->replaceBlock($content); }else{ $content = preg_replace_callback('/'.$begin.'block\sname=[\'"](.+?)[\'"]\s*?'.$end.'(.*?)'.$begin.'\/block'.$end.'/is', function($match){return stripslashes($match[2]);}, $content); } return $content; } /** * 分析XML属性 * @access private * @param string $attrs XML属性字符串 * @return array */ private function parseXmlAttrs($attrs) { $xml = ''; $xml = simplexml_load_string($xml); if(!$xml) E(L('_XML_TAG_ERROR_')); $xml = (array)($xml->tag->attributes()); $array = array_change_key_case($xml['@attributes']); return $array; } /** * 替换页面中的literal标签 * @access private * @param string $content 模板内容 * @return string|false */ private function parseLiteral($content) { if(is_array($content)) $content = $content[1]; if(trim($content)=='') return ''; //$content = stripslashes($content); $i = count($this->literal); $parseStr = ""; $this->literal[$i] = $content; return $parseStr; } /** * 还原被替换的literal标签 * @access private * @param string $tag literal标签序号 * @return string|false */ private function restoreLiteral($tag) { if(is_array($tag)) $tag = $tag[1]; // 还原literal标签 $parseStr = $this->literal[$tag]; // 销毁literal记录 unset($this->literal[$tag]); return $parseStr; } /** * 记录当前页面中的block标签 * @access private * @param string $name block名称 * @param string $content 模板内容 * @return string */ private function parseBlock($name,$content = '') { if(is_array($name)){ $content = $name[2]; $name = $name[1]; } $this->block[$name] = $content; return ''; } /** * 替换继承模板中的block标签 * @access private * @param string $content 模板内容 * @return string */ private function replaceBlock($content){ static $parse = 0; $begin = $this->config['taglib_begin']; $end = $this->config['taglib_end']; $reg = '/('.$begin.'block\sname=[\'"](.+?)[\'"]\s*?'.$end.')(.*?)'.$begin.'\/block'.$end.'/is'; if(is_string($content)){ do{ $content = preg_replace_callback($reg, array($this, 'replaceBlock'), $content); } while ($parse && $parse--); return $content; } elseif(is_array($content)){ if(preg_match('/'.$begin.'block\sname=[\'"](.+?)[\'"]\s*?'.$end.'/is', $content[3])){ //存在嵌套,进一步解析 $parse = 1; $content[3] = preg_replace_callback($reg, array($this, 'replaceBlock'), "{$content[3]}{$begin}/block{$end}"); return $content[1] . $content[3]; } else { $name = $content[2]; $content = $content[3]; $content = isset($this->block[$name]) ? $this->block[$name] : $content; return $content; } } } /** * 搜索模板页面中包含的TagLib库 * 并返回列表 * @access public * @param string $content 模板内容 * @return string|false */ public function getIncludeTagLib(& $content) { //搜索是否有TagLib标签 $find = preg_match('/'.$this->config['taglib_begin'].'taglib\s(.+?)(\s*?)\/'.$this->config['taglib_end'].'\W/is',$content,$matches); if($find) { //替换TagLib标签 $content = str_replace($matches[0],'',$content); //解析TagLib标签 $array = $this->parseXmlAttrs($matches[1]); $this->tagLib = explode(',',$array['name']); } return; } /** * TagLib库解析 * @access public * @param string $tagLib 要解析的标签库 * @param string $content 要解析的模板内容 * @param boolean $hide 是否隐藏标签库前缀 * @return string */ public function parseTagLib($tagLib,&$content,$hide=false) { $begin = $this->config['taglib_begin']; $end = $this->config['taglib_end']; if(strpos($tagLib,'\\')){ // 支持指定标签库的命名空间 $className = $tagLib; $tagLib = substr($tagLib,strrpos($tagLib,'\\')+1); }else{ $className = 'Think\\Template\TagLib\\'.ucwords($tagLib); } $tLib = \Think\Think::instance($className); $that = $this; foreach ($tLib->getTags() as $name=>$val){ $tags = array($name); if(isset($val['alias'])) {// 别名设置 $tags = explode(',',$val['alias']); $tags[] = $name; } $level = isset($val['level'])?$val['level']:1; $closeTag = isset($val['close'])?$val['close']:true; foreach ($tags as $tag){ $parseTag = !$hide? $tagLib.':'.$tag: $tag;// 实际要解析的标签名称 if(!method_exists($tLib,'_'.$tag)) { // 别名可以无需定义解析方法 $tag = $name; } $n1 = empty($val['attr'])?'(\s*?)':'\s([^'.$end.']*)'; $this->tempVar = array($tagLib, $tag); if (!$closeTag){ $patterns = '/'.$begin.$parseTag.$n1.'\/(\s*?)'.$end.'/is'; $content = preg_replace_callback($patterns, function($matches) use($tLib,$tag,$that){ return $that->parseXmlTag($tLib,$tag,$matches[1],$matches[2]); },$content); }else{ $patterns = '/'.$begin.$parseTag.$n1.$end.'(.*?)'.$begin.'\/'.$parseTag.'(\s*?)'.$end.'/is'; for($i=0;$i<$level;$i++) { $content=preg_replace_callback($patterns,function($matches) use($tLib,$tag,$that){ return $that->parseXmlTag($tLib,$tag,$matches[1],$matches[2]); },$content); } } } } } /** * 解析标签库的标签 * 需要调用对应的标签库文件解析类 * @access public * @param object $tagLib 标签库对象实例 * @param string $tag 标签名 * @param string $attr 标签属性 * @param string $content 标签内容 * @return string|false */ public function parseXmlTag($tagLib,$tag,$attr,$content) { if(ini_get('magic_quotes_sybase')) $attr = str_replace('\"','\'',$attr); $parse = '_'.$tag; $content = trim($content); $tags = $tagLib->parseXmlAttr($attr,$tag); return $tagLib->$parse($tags,$content); } /** * 模板标签解析 * 格式: {TagName:args [|content] } * @access public * @param string $tagStr 标签内容 * @return string */ public function parseTag($tagStr){ if(is_array($tagStr)) $tagStr = $tagStr[2]; //if (MAGIC_QUOTES_GPC) { $tagStr = stripslashes($tagStr); //} $flag = substr($tagStr,0,1); $flag2 = substr($tagStr,1,1); $name = substr($tagStr,1); if('$' == $flag && '.' != $flag2 && '(' != $flag2){ //解析模板变量 格式 {$varName} return $this->parseVar($name); }elseif('-' == $flag || '+'== $flag){ // 输出计算 return ''; }elseif(':' == $flag){ // 输出某个函数的结果 return ''; }elseif('~' == $flag){ // 执行某个函数 return ''; }elseif(substr($tagStr,0,2)=='//' || (substr($tagStr,0,2)=='/*' && substr(rtrim($tagStr),-2)=='*/')){ //注释标签 return ''; } // 未识别的标签直接返回 return C('TMPL_L_DELIM') . $tagStr .C('TMPL_R_DELIM'); } /** * 模板变量解析,支持使用函数 * 格式: {$varname|function1|function2=arg1,arg2} * @access public * @param string $varStr 变量数据 * @return string */ public function parseVar($varStr){ $varStr = trim($varStr); static $_varParseList = array(); //如果已经解析过该变量字串,则直接返回变量值 if(isset($_varParseList[$varStr])) return $_varParseList[$varStr]; $parseStr = ''; $varExists = true; if(!empty($varStr)){ $varArray = explode('|',$varStr); //取得变量名称 $var = array_shift($varArray); if('Think.' == substr($var,0,6)){ // 所有以Think.打头的以特殊变量对待 无需模板赋值就可以输出 $name = $this->parseThinkVar($var); }elseif( false !== strpos($var,'.')) { //支持 {$var.property} $vars = explode('.',$var); $var = array_shift($vars); switch(strtolower(C('TMPL_VAR_IDENTIFY'))) { case 'array': // 识别为数组 $name = '$'.$var; foreach ($vars as $key=>$val) $name .= '["'.$val.'"]'; break; case 'obj': // 识别为对象 $name = '$'.$var; foreach ($vars as $key=>$val) $name .= '->'.$val; break; default: // 自动判断数组或对象 只支持二维 $name = 'is_array($'.$var.')?$'.$var.'["'.$vars[0].'"]:$'.$var.'->'.$vars[0]; } }elseif(false !== strpos($var,'[')) { //支持 {$var['key']} 方式输出数组 $name = "$".$var; preg_match('/(.+?)\[(.+?)\]/is',$var,$match); $var = $match[1]; }elseif(false !==strpos($var,':') && false ===strpos($var,'(') && false ===strpos($var,'::') && false ===strpos($var,'?')){ //支持 {$var:property} 方式输出对象的属性 $vars = explode(':',$var); $var = str_replace(':','->',$var); $name = "$".$var; $var = $vars[0]; }else { $name = "$$var"; } //对变量使用函数 if(count($varArray)>0) $name = $this->parseVarFunction($name,$varArray); $parseStr = ''; } $_varParseList[$varStr] = $parseStr; return $parseStr; } /** * 对模板变量使用函数 * 格式 {$varname|function1|function2=arg1,arg2} * @access public * @param string $name 变量名 * @param array $varArray 函数列表 * @return string */ public function parseVarFunction($name,$varArray){ //对变量使用函数 $length = count($varArray); //取得模板禁止使用函数列表 $template_deny_funs = explode(',',C('TMPL_DENY_FUNC_LIST')); for($i=0;$i<$length ;$i++ ){ $args = explode('=',$varArray[$i],2); //模板函数过滤 $fun = trim($args[0]); switch($fun) { case 'default': // 特殊模板函数 $name = '(isset('.$name.') && ('.$name.' !== ""))?('.$name.'):'.$args[1]; break; default: // 通用模板函数 if(!in_array($fun,$template_deny_funs)){ if(isset($args[1])){ if(strstr($args[1],'###')){ $args[1] = str_replace('###',$name,$args[1]); $name = "$fun($args[1])"; }else{ $name = "$fun($name,$args[1])"; } }else if(!empty($args[0])){ $name = "$fun($name)"; } } } } return $name; } /** * 特殊模板变量解析 * 格式 以 $Think. 打头的变量属于特殊模板变量 * @access public * @param string $varStr 变量字符串 * @return string */ public function parseThinkVar($varStr){ $vars = explode('.',$varStr); $vars[1] = strtoupper(trim($vars[1])); $parseStr = ''; if(count($vars)>=3){ $vars[2] = trim($vars[2]); switch($vars[1]){ case 'SERVER': $parseStr = '$_SERVER[\''.strtoupper($vars[2]).'\']';break; case 'GET': $parseStr = '$_GET[\''.$vars[2].'\']';break; case 'POST': $parseStr = '$_POST[\''.$vars[2].'\']';break; case 'COOKIE': if(isset($vars[3])) { $parseStr = '$_COOKIE[\''.$vars[2].'\'][\''.$vars[3].'\']'; }else{ $parseStr = 'cookie(\''.$vars[2].'\')'; } break; case 'SESSION': if(isset($vars[3])) { $parseStr = '$_SESSION[\''.$vars[2].'\'][\''.$vars[3].'\']'; }else{ $parseStr = 'session(\''.$vars[2].'\')'; } break; case 'ENV': $parseStr = '$_ENV[\''.strtoupper($vars[2]).'\']';break; case 'REQUEST': $parseStr = '$_REQUEST[\''.$vars[2].'\']';break; case 'CONST': $parseStr = strtoupper($vars[2]);break; case 'LANG': $parseStr = 'L("'.$vars[2].'")';break; case 'CONFIG': if(isset($vars[3])) { $vars[2] .= '.'.$vars[3]; } $parseStr = 'C("'.$vars[2].'")';break; default:break; } }else if(count($vars)==2){ switch($vars[1]){ case 'NOW': $parseStr = "date('Y-m-d g:i a',time())"; break; case 'VERSION': $parseStr = 'THINK_VERSION'; break; case 'TEMPLATE': $parseStr = "'".$this->templateFile."'";//'C("TEMPLATE_NAME")'; break; case 'LDELIM': $parseStr = 'C("TMPL_L_DELIM")'; break; case 'RDELIM': $parseStr = 'C("TMPL_R_DELIM")'; break; default: if(defined($vars[1])) $parseStr = $vars[1]; } } return $parseStr; } /** * 加载公共模板并缓存 和当前模板在同一路径,否则使用相对路径 * @access private * @param string $tmplPublicName 公共模板文件名 * @param array $vars 要传递的变量列表 * @return string */ private function parseIncludeItem($tmplPublicName,$vars=array(),$extend){ // 分析模板文件名并读取内容 $parseStr = $this->parseTemplateName($tmplPublicName); // 替换变量 foreach ($vars as $key=>$val) { $parseStr = str_replace('['.$key.']',$val,$parseStr); } // 再次对包含文件进行模板分析 return $this->parseInclude($parseStr,$extend); } /** * 分析加载的模板文件并读取内容 支持多个模板文件读取 * @access private * @param string $tmplPublicName 模板文件名 * @return string */ private function parseTemplateName($templateName){ if(substr($templateName,0,1)=='$') //支持加载变量文件名 $templateName = $this->get(substr($templateName,1)); $array = explode(',',$templateName); $parseStr = ''; foreach ($array as $templateName){ if(empty($templateName)) continue; if(false === strpos($templateName,$this->config['template_suffix'])) { // 解析规则为 模块@主题/控制器/操作 $templateName = T($templateName); } // 获取模板文件内容 $parseStr .= file_get_contents($templateName); } return $parseStr; } }