php foreach()用法

foreach ($array as $key => $value)

foreach    仅能用于数组，每次循环中，当前单元的键名也会在每次循环中被赋给变量    $key。当前单元的值被赋给 $value    并且数组内部的指针向前移一步。

$arr ----->代表数组，就是你要循环的数组

$key ----->代表键，每次循环的键

$vol ------>代表值，每次循环的值

foreach($article_type as $n=> $val){

$article_type[$n]['voo']=$article->limit('11')->order('id desc')->where('type_id='.$val['id'])->select();//将type_id相同的article字段存入$article_type[$n]['voo']
        //dump($article_type[$n]);

}

array(6) {  ["id"] => string(1) "1"  ["name"] => string(13) "文章分类1"  ["brief"] => string(6) "fenlei"  ["bieming"] => string(6) "fenlei"  ["addtime"] => string(19) "2012-10-12 00:00:00"  ["voo"] => array(2) {    [0] => array(5) {      ["id"] => string(1) "4"      ["type_id"] => string(1) "1"      ["article_name"] => string(18) "文章测试测试"      ["article_content"] => string(18) "文章文章文章"      ["article_time"] => string(19) "2015-03-11 14:05:23"    }    [1] => array(5) {      ["id"] => string(1) "1"      ["type_id"] => string(1) "1"      ["article_name"] => string(12) "文章测试"      ["article_content"] => string(120) "<p>文章测试文章测试文章测试文章测试文章测试文章测试文章测试文章测试文章测试</p>"      ["article_time"] => string(19) "2012-10-12 19:52:34"    }  }}

array(6) {  ["id"] => string(1) "2"  ["name"] => string(13) "文章分类2"  ["brief"] => string(6) "fenlei"  ["bieming"] => string(6) "fenlei"  ["addtime"] => string(19) "2012-10-12 00:00:00"  ["voo"] => array(1) {    [0] => array(5) {      ["id"] => string(1) "2"      ["type_id"] => string(1) "2"      ["article_name"] => string(8) "wenzhang"      ["article_content"] => string(16) "wenzhangwenzhang"      ["article_time"] => string(19) "2015-03-11 14:03:49"    }  }}

array(6) {  ["id"] => string(1) "3"  ["name"] => string(13) "文章分类3"  ["brief"] => string(6) "fenlei"  ["bieming"] => string(6) "fenlei"  ["addtime"] => string(19) "2012-10-12 00:00:00"  ["voo"] => array(1) {    [0] => array(5) {      ["id"] => string(1) "3"      ["type_id"] => string(1) "3"      ["article_name"] => string(6) "文章"      ["article_content"] => string(12) "文章文章"      ["article_time"] => string(19) "2015-03-11 14:04:15"    }  }}

<div class="article">
 <volist name="list" id="vo">
     <div class="article_1">
     <div class="a_1_top_l">{$vo.name}</div>
     <div class="a_1_top_r"></div>
     <div class="a_1_left"></div>
     <volist name="vo['voo']" id="sub">
                 <!--__APP__当前项目地址-->
       <div class="a_list"><a href="__APP__/article/content/id/{$sub.id}">{$sub.article_name}</a></div>
     </volist>
     </div>
 </volist>
</div>