Thinkphp模板中if嵌套层级过多的问题，嵌套3级就报错，取消层级限制解决此问题有两种办法：1、第三层if换成eq或者原⽣<?php 'abc';> 2、修改Tp核⼼配置⽂件1、第三层if换成eq或者原⽣<?php 'abc';>如下图<eq name="uid" value="">未登录状态下<else />登录状态下 </eq>name为条件和value为值2、修改TP核⼼配置⽂件，路径如下thinkphp/ThinkPHP/Library/Think/Template/TagLib/Cx.class.php<?php// +----------------------------------------------------------------------// | ThinkPHP [ WE CAN DO IT JUST THINK IT ]// +----------------------------------------------------------------------// | Copyright (c) 2006-2014 All rights reserved.// +----------------------------------------------------------------------// | Licensed ( /licenses/LICENSE-2.0 )// +----------------------------------------------------------------------// | Author: liu21st <liu21st@>// +----------------------------------------------------------------------namespace Think\Template\TagLib;use Think\Template\TagLib;/*** CX标签库解析类*/class Cx extends TagLib{// 标签定义protected $tags = array(// 标签定义： attr 属性列表 close 是否闭合（0 或者1 默认1） alias 标签别名 level 嵌套层次'php' => array(),'volist' => array('attr' => 'name,id,offset,length,key,mod', 'level' => 3, 'alias' => 'iterate'),'foreach' => array('attr' => 'name,item,key', 'level' => 3),'if' => array('attr' => 'condition', 'level' => 2),'elseif' => array('attr' => 'condition', 'close' => 0),'else' => array('attr' => '', 'close' => 0),'switch' => array('attr' => 'name', 'level' => 2),'case' => array('attr' => 'value,break'),'default' => array('attr' => '', 'close' => 0),'compare' => array('attr' => 'name,value,type', 'level' => 3, 'alias' => 'eq,equal,notequal,neq,gt,lt,egt,elt,heq,nheq'),'range' => array('attr' => 'name,value,type', 'level' => 3, 'alias' => 'in,notin,between,notbetween'),'empty' => array('attr' => 'name', 'level' => 3),'notempty' => array('attr' => 'name', 'level' => 3),'present' => array('attr' => 'name', 'level' => 3),'notpresent' => array('attr' => 'name', 'level' => 3),'defined' => array('attr' => 'name', 'level' => 3),'notdefined' => array('attr' => 'name', 'level' => 3),'import' => array('attr' => 'file,href,type,value,basepath', 'close' => 0, 'alias' => 'load,css,js'),'assign' => array('attr' => 'name,value', 'close' => 0),'define' => array('attr' => 'name,value', 'close' => 0),'for' => array('attr' => 'start,end,name,comparison,step', 'level' => 3),);/*** php标签解析* @access public* @param array $tag 标签属性* @param string $content 标签内容* @return string*/public function _php($tag, $content){$parseStr = '<?php ' . $content . ' ?>';return $parseStr;}/*** volist标签解析循环输出数据集* 格式：* <volist name="userList" id="user" empty="" >* {ername}* {user.email}* </volist>* @access public* @param array $tag 标签属性* @param string $content 标签内容* @return string|void$name = $tag['name'];$id = $tag['id'];$empty = isset($tag['empty']) ? $tag['empty'] : '';$key = !empty($tag['key']) ? $tag['key'] : 'i';$mod = isset($tag['mod']) ? $tag['mod'] : '2';// 允许使⽤函数设定数据集 <volist name=":fun('arg')" id="vo">{$}</volist>$parseStr = '<?php ';if (0 === strpos($name, ':')) {$parseStr .= '$_result=' . substr($name, 1) . ';';$name = '$_result';} else {$name = $this->autoBuildVar($name);}$parseStr .= 'if(is_array(' . $name . ')): $' . $key . ' = 0;';if (isset($tag['length']) && '' != $tag['length']) {$parseStr .= ' $__LIST__ = array_slice(' . $name . ',' . $tag['offset'] . ',' . $tag['length'] . ',true);'; } elseif (isset($tag['offset']) && '' != $tag['offset']) {$parseStr .= ' $__LIST__ = array_slice(' . $name . ',' . $tag['offset'] . ',null,true);';} else {$parseStr .= ' $__LIST__ = ' . $name . ';';}$parseStr .= 'if( count($__LIST__)==0 ) : echo "' . $empty . '" ;';$parseStr .= 'else: ';$parseStr .= 'foreach($__LIST__ as $key=>$' . $id . '): ';$parseStr .= '$mod = ($' . $key . ' % ' . $mod . ' );';$parseStr .= '++$' . $key . ';?>';$parseStr .= $this->tpl->parse($content);$parseStr .= '<?php endforeach; endif; else: echo "' . $empty . '" ;endif; ?>';if (!empty($parseStr)) {return $parseStr;}return;}/*** foreach标签解析循环输出数据集* @access public* @param array $tag 标签属性* @param string $content 标签内容* @return string|void*/public function _foreach($tag, $content){$name = $tag['name'];$item = $tag['item'];$key = !empty($tag['key']) ? $tag['key'] : 'key';$name = $this->autoBuildVar($name);$parseStr = '<?php if(is_array(' . $name . ')): foreach(' . $name . ' as $' . $key . '=>$' . $item . '): ?>'; $parseStr .= $this->tpl->parse($content);$parseStr .= '<?php endforeach; endif; ?>';if (!empty($parseStr)) {return $parseStr;}return;}/*** if标签解析* 格式：* <if condition=" $a eq 1" >* <elseif condition="$a eq 2" />* <else />* </if>* 表达式⽀持 eq neq gt egt lt elt == > >= < <= or and || &&* @access public* @param array $tag 标签属性* @param string $content 标签内容* @return string*/public function _if($tag, $content){$condition = $this->parseCondition($tag['condition']);$parseStr = '<?php if(' . $condition . '): ?>' . $content . '<?php endif; ?>';return $parseStr;}/*** else标签解析* 格式：见if标签* @access public* @param array $tag 标签属性* @param string $content 标签内容* @return string*/public function _elseif($tag, $content){$condition = $this->parseCondition($tag['condition']);$parseStr = '<?php elseif(' . $condition . '): ?>';return $parseStr;}/*** else标签解析* @access public* @param array $tag 标签属性public function _else($tag){$parseStr = '<?php else: ?>';return $parseStr;}/*** switch标签解析* 格式：* <switch name="" >* <case value="1" break="false">1</case>* <case value="2" >2</case>* <default />other* </switch>* @access public* @param array $tag 标签属性* @param string $content 标签内容* @return string*/public function _switch($tag, $content){$name = $tag['name'];$varArray = explode('|', $name);$name = array_shift($varArray);$name = $this->autoBuildVar($name);if (count($varArray) > 0) {$name = $this->tpl->parseVarFunction($name, $varArray);}$parseStr = '<?php switch(' . $name . '): ?>' . $content . '<?php endswitch;?>'; return $parseStr;}/*** case标签解析需要配合switch才有效* @access public* @param array $tag 标签属性* @param string $content 标签内容* @return string*/public function _case($tag, $content){$value = $tag['value'];if ('$' == substr($value, 0, 1)) {$varArray = explode('|', $value);$value = array_shift($varArray);$value = $this->autoBuildVar(substr($value, 1));if (count($varArray) > 0) {$value = $this->tpl->parseVarFunction($value, $varArray);}$value = 'case ' . $value . ': ';} elseif (strpos($value, '|')) {$values = explode('|', $value);$value = '';foreach ($values as $val) {$value .= 'case "' . addslashes($val) . '": ';}} else {$value = 'case "' . $value . '": ';}$parseStr = '<?php ' . $value . ' ?>' . $content;$isBreak = isset($tag['break']) ? $tag['break'] : '';if ('' == $isBreak || $isBreak) {$parseStr .= '<?php break;?>';}return $parseStr;}/*** default标签解析需要配合switch才有效* 使⽤： <default />ddfdf* @access public* @param array $tag 标签属性* @param string $content 标签内容* @return string*/public function _default($tag){$parseStr = '<?php default: ?>';return $parseStr;}/*** compare标签解析* ⽤于值的⽐较⽀持 eq neq gt lt egt elt heq nheq 默认是eq* 格式： <compare name="" type="eq" value="" >content</compare>* @access public* @param array $tag 标签属性* @param string $content 标签内容* @return string*/public function _compare($tag, $content, $type = 'eq'){$name = $tag['name'];$value = $tag['value'];$type = isset($tag['type']) ? $tag['type'] : $type;$name = array_shift($varArray);$name = $this->autoBuildVar($name);if (count($varArray) > 0) {$name = $this->tpl->parseVarFunction($name, $varArray);}if ('$' == substr($value, 0, 1)) {$value = $this->autoBuildVar(substr($value, 1));} else {$value = '"' . $value . '"';}$parseStr = '<?php if((' . $name . ') ' . $type . ' ' . $value . '): ?>' . $content . '<?php endif; ?>';return $parseStr;}public function _eq($tag, $content){return $this->_compare($tag, $content, 'eq');}public function _equal($tag, $content){return $this->_compare($tag, $content, 'eq');}public function _neq($tag, $content){return $this->_compare($tag, $content, 'neq');}public function _notequal($tag, $content){return $this->_compare($tag, $content, 'neq');}public function _gt($tag, $content){return $this->_compare($tag, $content, 'gt');}public function _lt($tag, $content){return $this->_compare($tag, $content, 'lt');}public function _egt($tag, $content){return $this->_compare($tag, $content, 'egt');}public function _elt($tag, $content){return $this->_compare($tag, $content, 'elt');}public function _heq($tag, $content){return $this->_compare($tag, $content, 'heq');}public function _nheq($tag, $content){return $this->_compare($tag, $content, 'nheq');}/*** range标签解析* 如果某个变量存在于某个范围则输出内容 type= in 表⽰在范围内否则表⽰在范围外* 格式： <range name="var|function" value="val" type='in|notin' >content</range>* example: <range name="a" value="1,2,3" type='in' >content</range>* @access public* @param array $tag 标签属性* @param string $content 标签内容* @param string $type ⽐较类型* @return string*/public function _range($tag, $content, $type = 'in'){$name = $tag['name'];$value = $tag['value'];$varArray = explode('|', $name);$name = array_shift($varArray);$name = $this->autoBuildVar($name);if (count($varArray) > 0) {$name = $this->tpl->parseVarFunction($name, $varArray);}$type = isset($tag['type']) ? $tag['type'] : $type;if ('$' == substr($value, 0, 1)) {$value = $this->autoBuildVar(substr($value, 1));$str = 'is_array(' . $value . ')?' . $value . ':explode(\',\',' . $value . ')';} else {$value = '"' . $value . '"';$str = 'explode(\',\',' . $value . ')';}if ('between' == $type) {$parseStr = '<?php $_RANGE_VAR_=' . $str . ';if(' . $name . '>= $_RANGE_VAR_[0] && ' . $name . '<= $_RANGE_VAR_[1]):?>' . $content . '<?php endif; ?>'; } elseif ('notbetween' == $type) {$parseStr = '<?php $_RANGE_VAR_=' . $str . ';if(' . $name . '<$_RANGE_VAR_[0] || ' . $name . '>$_RANGE_VAR_[1]):?>' . $content . '<?php endif; ?>';} else {$fun = ('in' == $type) ? 'in_array' : '!in_array';$parseStr = '<?php if(' . $fun . '((' . $name . '), ' . $str . ')): ?>' . $content . '<?php endif; ?>';}return $parseStr;public function _in($tag, $content){return $this->_range($tag, $content, 'in');}// range标签的别名⽤于notin判断public function _notin($tag, $content){return $this->_range($tag, $content, 'notin');}public function _between($tag, $content){return $this->_range($tag, $content, 'between');}public function _notbetween($tag, $content){return $this->_range($tag, $content, 'notbetween');}/*** present标签解析* 如果某个变量已经设置则输出内容* 格式： <present name="" >content</present>* @access public* @param array $tag 标签属性* @param string $content 标签内容* @return string*/public function _present($tag, $content){$name = $tag['name'];$name = $this->autoBuildVar($name);$parseStr = '<?php if(isset(' . $name . ')): ?>' . $content . '<?php endif; ?>';return $parseStr;}/*** notpresent标签解析* 如果某个变量没有设置，则输出内容* 格式： <notpresent name="" >content</notpresent>* @access public* @param array $tag 标签属性* @param string $content 标签内容* @return string*/public function _notpresent($tag, $content){$name = $tag['name'];$name = $this->autoBuildVar($name);$parseStr = '<?php if(!isset(' . $name . ')): ?>' . $content . '<?php endif; ?>';return $parseStr;}/*** empty标签解析* 如果某个变量为empty 则输出内容* 格式： <empty name="" >content</empty>* @access public* @param array $tag 标签属性* @param string $content 标签内容* @return string*/public function _empty($tag, $content){$name = $tag['name'];$name = $this->autoBuildVar($name);$parseStr = '<?php if(empty(' . $name . ')): ?>' . $content . '<?php endif; ?>';return $parseStr;}public function _notempty($tag, $content){$name = $tag['name'];$name = $this->autoBuildVar($name);$parseStr = '<?php if(!empty(' . $name . ')): ?>' . $content . '<?php endif; ?>'; return $parseStr;}/*** 判断是否已经定义了该常量* <defined name='TXT'>已定义</defined>* @param <type> $attr* @param <type> $content* @return string*/public function _defined($tag, $content){$name = $tag['name'];$parseStr = '<?php if(defined("' . $name . '")): ?>' . $content . '<?php endif; ?>'; return $parseStr;}public function _notdefined($tag, $content){$name = $tag['name'];$parseStr = '<?php if(!defined("' . $name . '")): ?>' . $content . '<?php endif; ?>'; return $parseStr;}* <import file="Css.Base" type="css" />* @access public* @param array $tag 标签属性* @param string $content 标签内容* @param boolean $isFile 是否⽂件⽅式* @param string $type 类型* @return string*/public function _import($tag, $content, $isFile = false, $type = ''){$file = isset($tag['file']) ? $tag['file'] : $tag['href'];$parseStr = '';$endStr = '';// 判断是否存在加载条件允许使⽤函数判断(默认为isset)if (isset($tag['value'])) {$varArray = explode('|', $tag['value']);$name = array_shift($varArray);$name = $this->autoBuildVar($name);if (!empty($varArray)) {$name = $this->tpl->parseVarFunction($name, $varArray);} else {$name = 'isset(' . $name . ')';}$parseStr .= '<?php if(' . $name . '): ?>';$endStr = '<?php endif; ?>';}if ($isFile) {// 根据⽂件名后缀⾃动识别$type = $type ? $type : (!empty($tag['type']) ? strtolower($tag['type']) : null);// ⽂件⽅式导⼊$array = explode(',', $file);foreach ($array as $val) {if (!$type || isset($reset)) {$type = $reset = strtolower(substr(strrchr($val, '.'), 1));}switch ($type) {case 'js':$parseStr .= '<script type="text/javascript" src="' . $val . '"></script>';break;case 'css':$parseStr .= '<link rel="stylesheet" type="text/css" href="' . $val . '" />';break;case 'php':$parseStr .= '<?php require_cache("' . $val . '"); ?>';break;}}} else {// 命名空间导⼊模式默认是js$type = $type ? $type : (!empty($tag['type']) ? strtolower($tag['type']) : 'js');$basepath = !empty($tag['basepath']) ? $tag['basepath'] : __ROOT__ . '/Public';// 命名空间⽅式导⼊外部⽂件$array = explode(',', $file);foreach ($array as $val) {if (strpos($val, '?')) {list($val, $version) = explode('?', $val);} else {$version = '';}switch ($type) {case 'js':$parseStr .= '<script type="text/javascript" src="' . $basepath . '/' . str_replace(array('.', '#'), array('/', '.'), $val) . '.js' . ($version ? '?' . $version : '') . '"></script>';break;case 'css':$parseStr .= '<link rel="stylesheet" type="text/css" href="' . $basepath . '/' . str_replace(array('.', '#'), array('/', '.'), $val) . '.css' . ($version ? '?' . $version : '') . '" />'; break;case 'php':$parseStr .= '<?php import("' . $val . '"); ?>';break;}}}return $parseStr . $endStr;}// import别名采⽤⽂件⽅式加载(要使⽤命名空间必须⽤import) 例如 <load file="__PUBLIC__/Js/Base.js" />public function _load($tag, $content){return $this->_import($tag, $content, true);}// import别名使⽤导⼊css⽂件 <css file="__PUBLIC__/Css/Base.css" />public function _css($tag, $content){return $this->_import($tag, $content, true, 'css');}// import别名使⽤导⼊js⽂件 <js file="__PUBLIC__/Js/Base.js" />public function _js($tag, $content){return $this->_import($tag, $content, true, 'js');}/*** assign标签解析* @access public* @param array $tag 标签属性* @param string $content 标签内容* @return string*/public function _assign($tag, $content){$name = $this->autoBuildVar($tag['name']);if ('$' == substr($tag['value'], 0, 1)) {$value = $this->autoBuildVar(substr($tag['value'], 1));} else {$value = '\'' . $tag['value'] . '\'';}$parseStr = '<?php ' . $name . ' = ' . $value . '; ?>';return $parseStr;}/*** define标签解析* 在模板中定义常量⽀持变量赋值* 格式： <define name="" value="" />* @access public* @param array $tag 标签属性* @param string $content 标签内容* @return string*/public function _define($tag, $content){$name = '\'' . $tag['name'] . '\'';if ('$' == substr($tag['value'], 0, 1)) {$value = $this->autoBuildVar(substr($tag['value'], 1));} else {$value = '\'' . $tag['value'] . '\'';}$parseStr = '<?php define(' . $name . ', ' . $value . '); ?>';return $parseStr;}/*** for标签解析* 格式： <for start="" end="" comparison="" step="" name="" />* @access public* @param array $tag 标签属性* @param string $content 标签内容* @return string*/public function _for($tag, $content){//设置默认值$start = 0;$end = 0;$step = 1;$comparison = 'lt';$name = 'i';$rand = rand(); //添加随机数，防⽌嵌套变量冲突//获取属性foreach ($tag as $key => $value) {$value = trim($value);if (':' == substr($value, 0, 1)) {$value = substr($value, 1);} elseif ('$' == substr($value, 0, 1)) {$value = $this->autoBuildVar(substr($value, 1));}switch ($key) {case 'start':$start = $value;break;case 'end':$end = $value;break;case 'step':$step = $value;break;case 'comparison':$comparison = $value;break;case 'name':$name = $value;break;}}$parseStr = '<?php $__FOR_START_' . $rand . '__=' . $start . ';$__FOR_END_' . $rand . '__=' . $end . ';';$parseStr .= 'for($' . $name . '=$__FOR_START_' . $rand . '__;' . $this->parseCondition('$' . $name . ' ' . $comparison . ' $__FOR_END_' . $rand . '__') . ';$' . $name . '+=' . $step . '){ ?>'; $parseStr .= $content;$parseStr .= '<?php } ?>';return $parseStr;}}。
