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
程序员文章站
2022-03-21 21:34:32
解决此问题有两种办法：1、第三层if换成eq或者原生 2、修改Tp核心配置文件 1、第三层if换成eq或者原生 如下图未登录状态下 name为条件 和value为 ......
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 http://thinkphp.cn all rights reserved.
// +----------------------------------------------------------------------
// | licensed ( http://www.apache.org/licenses/license-2.0 )
// +----------------------------------------------------------------------
// | author: liu21st <liu21st@gmail.com>
// +----------------------------------------------------------------------
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="" >
* {user.username}
* {user.email}
* </volist>
* @access public
* @param array $tag 标签属性
* @param string $content 标签内容
* @return string|void
*/
public function _volist($tag, $content)
{
$name = $tag['name'];
$id = $tag['id'];
$empty = isset($tag['empty']) ? $tag['empty'] : '';
$key = !empty($tag['key']) ? $tag['key'] : 'i';
$mod = isset($tag['mod']) ? $tag['mod'] : '2';
// 允许使用函数设定数据集 <volist name=":fun('arg')" id="vo">{$vo.name}</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 $tag 标签属性
* @return string
*/
public function _else($tag)
{
$parsestr = '<?php else: ?>';
return $parsestr;
}
/**
* switch标签解析
* 格式：
* <switch name="a.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;
$type = $this->parsecondition(' ' . $type . ' ');
$vararray = explode('|', $name);
$name = array_shift($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 $parsestr;
}
// range标签的别名 用于in判断
public function _in($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 标签解析 <import file="js.base" />
* <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
* 在模板中给某个变量赋值 支持变量赋值
* 格式： <assign name="" value="" />
* @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;
}
}