标签嵌套超过三层的替代解决方法

虽然不建议构造过于庞大的数组，但实际工作中可能会遇到超过三维的数据需要处理。
手册8.22标签嵌套核心内容如下：默认的嵌套层次是3级，所以嵌套层次不能超过3层，如果需要更多的层次可以指定TAG_NESTED_LEVEL配置参数，例如：<br> 'TAG_NESTED_LEVEL' =&gt;5<br> 可以改变循环嵌套级别为5级。
但是，似乎配置了此参数并未起作用，原因见http://www.thinkphp.cn/topic/3652.html问题中182821的回答。
此前，haran并未实际操作，想当然地照搬手册中的内容，加之基础不牢，对框架源码的理解遭遇瓶颈，解答并未起到解决问题的作用。
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但是，经过实践，haran发现，此处的三层只限定为单一标签。所以，haran又祭起笨方法的大旗，变通解决如下（此方法只征对数组，未使用对象测试）：
先构建数组：$this-&gt;arr = array(<br>     '0'=&gt;array(<br>         '0'=&gt;array(<br>             '0'=&gt;array(<br>                 '0'=&gt;array(<br>                     '0'=&gt;array(<br>                         'id'=&gt;'1',<br>                         'name'=&gt;'haran1'<br>                         ),<br>                     '1'=&gt;array(<br>                         'id'=&gt;'2',<br>                         'name'=&gt;'zhang1'<br>                         )<br>                     ),<br>                 '1'=&gt;array(<br>                     '0'=&gt;array(<br>                         'id'=&gt;'21',<br>                         'name'=&gt;'haran2'<br>                         ),<br>                     '1'=&gt;array(<br>                         'id'=&gt;'22',<br>                         'name'=&gt;'zhang2'<br>                         )<br>                     )<br>                 ),<br>             '1'=&gt;array(<br>                 '0'=&gt;array(<br>                     '0'=&gt;array(<br>                         'id'=&gt;'31',<br>                         'name'=&gt;'haran3'<br>                         ),<br>                     '1'=&gt;array(<br>                         'id'=&gt;'32',<br>                         'name'=&gt;'zhang3'<br>                         )<br>                     ),<br>                 '1'=&gt;array(<br>                     '0'=&gt;array(<br>                         'id'=&gt;'41',<br>                         'name'=&gt;'haran4'<br>                         ),<br>                     '1'=&gt;array(<br>                         'id'=&gt;'42',<br>                         'name'=&gt;'zhang4'<br>                         )<br>                     )<br>                 )<br>             ),<br>         '1'=&gt;array(<br>             '0'=&gt;array(<br>                 '0'=&gt;array(<br>                     '0'=&gt;array(<br>                         'id'=&gt;'51',<br>                         'name'=&gt;'haran5'<br>                         ),<br>                     '1'=&gt;array(<br>                         'id'=&gt;'52',<br>                         'name'=&gt;'zhang5'<br>                         )<br>                     ),<br>                 '1'=&gt;array(<br>                     '0'=&gt;array(<br>                         'id'=&gt;'61',<br>                         'name'=&gt;'haran6'<br>                         ),<br>                     '1'=&gt;array(<br>                         'id'=&gt;'62',<br>                         'name'=&gt;'zhang6'<br>                         )<br>                     )<br>                 ),<br>             '1'=&gt;array(<br>                 '0'=&gt;array(<br>                     '0'=&gt;array(<br>                         'id'=&gt;'71',<br>                         'name'=&gt;'haran7'<br>                         ),<br>                     '1'=&gt;array(<br>                         'id'=&gt;'72',<br>                         'name'=&gt;'zhang7'<br>                         )<br>                     ),<br>                 '1'=&gt;array(<br>                     '0'=&gt;array(<br>                         'id'=&gt;'81',<br>                         'name'=&gt;'haran8'<br>                         ),<br>                     '1'=&gt;array(<br>                         'id'=&gt;'82',<br>                         'name'=&gt;'zhang8'<br>                         )<br>                     )<br>                 )<br>             )<br>         ),<br>     '1'=&gt;array(<br>         '0'=&gt;array(<br>             '0'=&gt;array(<br>                 '0'=&gt;array(<br>                     '0'=&gt;array(<br>                         'id'=&gt;'91',<br>                         'name'=&gt;'haran9'<br>                         ),<br>                     '1'=&gt;array(<br>                         'id'=&gt;'92',<br>                         'name'=&gt;'zhang9'<br>                         )<br>                     ),<br>                 '1'=&gt;array(<br>                     '0'=&gt;array(<br>                         'id'=&gt;'101',<br>                         'name'=&gt;'haran10'<br>                         ),<br>                     '1'=&gt;array(<br>                         'id'=&gt;'102',<br>                         'name'=&gt;'zhang10'<br>                         )<br>                     )<br>                 ),<br>             '1'=&gt;array(<br>                 '0'=&gt;array(<br>                     '0'=&gt;array(<br>                         'id'=&gt;'111',<br>                         'name'=&gt;'haran11'<br>                         ),<br>                     '1'=&gt;array(<br>                         'id'=&gt;'112',<br>                         'name'=&gt;'zhang11'<br>                         )<br>                     ),<br>                 '1'=&gt;array(<br>                     '0'=&gt;array(<br>                         'id'=&gt;'121',<br>                         'name'=&gt;'haran12'<br>                         ),<br>                     '1'=&gt;array(<br>                         'id'=&gt;'122',<br>                         'name'=&gt;'zhang12'<br>                         )<br>                     )<br>                 )<br>             ),<br>         '1'=&gt;array(<br>             '0'=&gt;array(<br>                 '0'=&gt;array(<br>                     '0'=&gt;array(<br>                         'id'=&gt;'131',<br>                         'name'=&gt;'haran13'<br>                         ),<br>                     '1'=&gt;array(<br>                         'id'=&gt;'132',<br>                         'name'=&gt;'zhang13'<br>                         )<br>                     ),<br>                 '1'=&gt;array(<br>                     '0'=&gt;array(<br>                         'id'=&gt;'141',<br>                         'name'=&gt;'haran14'<br>                         ),<br>                     '1'=&gt;array(<br>                         'id'=&gt;'142',<br>                         'name'=&gt;'zhang14'<br>                         )<br>                     )<br>                 ),<br>             '1'=&gt;array(<br>                 '0'=&gt;array(<br>                     '0'=&gt;array(<br>                         'id'=&gt;'151',<br>                         'name'=&gt;'haran15'<br>                         ),<br>                     '1'=&gt;array(<br>                         'id'=&gt;'152',<br>                         'name'=&gt;'zhang15'<br>                         )<br>                     ),<br>                 '1'=&gt;array(<br>                     '0'=&gt;array(<br>                         'id'=&gt;'161',<br>                         'name'=&gt;'haran16'<br>                         ),<br>                     '1'=&gt;array(<br>                         'id'=&gt;'162',<br>                         'name'=&gt;'zhang16'<br>                         )<br>                     )<br>                 )<br>             )<br>         )<br>     );模板代码：<volist><br>     第一层<br><br>     <volist><br>         --第二层<br><br>         <volist><br>             ----第三层<br><br>             <foreach><br>                 ------第四层<br><br>                 <foreach><br>                     --------第五层|||<br><br>                 </foreach><br>             </foreach><br>         </volist><br>     </volist><br></volist>输出：第一层1<br> --第二层1<br> ----第三层1<br> ------第四层0<br> --------第五层1|haran1||0<br> --------第五层2|zhang1||1<br> ------第四层1<br> --------第五层21|haran2||0<br> --------第五层22|zhang2||1<br> ----第三层2<br> ------第四层0<br> --------第五层31|haran3||0<br> --------第五层32|zhang3||1<br> ------第四层1<br> --------第五层41|haran4||0<br> --------第五层42|zhang4||1<br> --第二层2<br> ----第三层1<br> ------第四层0<br> --------第五层51|haran5||0<br> --------第五层52|zhang5||1<br> ------第四层1<br> --------第五层61|haran6||0<br> --------第五层62|zhang6||1<br> ----第三层2<br> ------第四层0<br> --------第五层71|haran7||0<br> --------第五层72|zhang7||1<br> ------第四层1<br> --------第五层81|haran8||0<br> --------第五层82|zhang8||1<br> 第一层2<br> --第二层1<br> ----第三层1<br> ------第四层0<br> --------第五层91|haran9||0<br> --------第五层92|zhang9||1<br> ------第四层1<br> --------第五层101|haran10||0<br> --------第五层102|zhang10||1<br> ----第三层2<br> ------第四层0<br> --------第五层111|haran11||0<br> --------第五层112|zhang11||1<br> ------第四层1<br> --------第五层121|haran12||0<br> --------第五层122|zhang12||1<br> --第二层2<br> ----第三层1<br> ------第四层0<br> --------第五层131|haran13||0<br> --------第五层132|zhang13||1<br> ------第四层1<br> --------第五层141|haran14||0<br> --------第五层142|zhang14||1<br> ----第三层2<br> ------第四层0<br> --------第五层151|haran15||0<br> --------第五层152|zhang15||1<br> ------第四层1<br> --------第五层161|haran16||0<br> --------第五层162|zhang16||1关键点：volist三层后改用foreach嵌套

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