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Home Backend Development PHP Tutorial 总是搞不懂foreach怎么这样遍历这样的数组

总是搞不懂foreach怎么这样遍历这样的数组

Jun 23, 2016 pm 02:25 PM

例如有这样一个数组:
array(4) {
  ["title"]=>
  array(9) {
    [0]=>
    string(3) "标题1"
    [1]=>
    string(3) "标题2"
    [2]=>
    string(3) "标题3"
    [3]=>
    string(3) "标题4"
  }
  ["id"]=>
  array(9) {
    [0]=>
    string(1) "n1"
    [1]=>
    string(1) "n2"
    [2]=>
    string(1) "n3"
    [3]=>
    string(1) "n4"
  }
  ["pic"]=>
  array(9) {
    [0]=>
    string(4) "1.jpg"
    [1]=>
    string(4) "2.jpg"
    [2]=>
    string(4) "3.jpg"
    [3]=>
    string(4) "4.jpg"
  }
  ["price"]=>
  array(9) {
    [0]=>
    string(5) "85.00"
    [1]=>
    string(6) "155.00"
    [2]=>
    string(5) "49.00"
    [3]=>
    string(5) "75.00"
  }
  ....更多数组

}

我想把里面的数据这样遍历循环出来:



  • 总是搞不懂foreach怎么这样遍历这样的数组
    标题1
    85.00




  • 总是搞不懂foreach怎么这样遍历这样的数组
    标题2
    155.00




  • 总是搞不懂foreach怎么这样遍历这样的数组
    标题3
    49.00




  • 总是搞不懂foreach怎么这样遍历这样的数组
    标题4
    75.00




  • 里面应该怎么写的?
    foreach($arr as $key => $value)
    {
    foreach(里面不会写了)
    {
    echo '
  • ';
    echo '';
    echo '总是搞不懂foreach怎么这样遍历这样的数组';
    echo $title;
    echo ''.$price.'';
    echo '';
    echo '
  • ';
    }
    }

    回复讨论(解决方案)

    foreach( $value as  $k=>$v)
    红色的和上一层的值相同,蓝色则要不同

    你这种数组结构,最好用我之前发过的一个二维数组类做一次行列转换,就简单多了,输出时遍历一次则可

    你这种数组结构,最好用我之前发过的一个二维数组类做一次行列转换,就简单多了,输出时遍历一次则可
    在哪?链接可否发我一下。

    我发的帖子很少,你搜一下就能找到

    其实如果你能确认数组的键值对应,也可以直接遍历二维键值
    for($i=0;$i     echo $array["title"][$i];
        ……
    }

    foreach( $value as  $k=>$v)
    红色的和上一层的值相同,蓝色则要不同
    这样出来的是就是所有数据了。
    效果是这样了:
    标题1
    标题2
    标题3
    标题4
    n1
    n2
    n3
    n4
    1.jpg
    2.jpg
    3.jpg
    4.jpg
    85.00
    155.00
    49.00
    75.00

    只是取出了所有数据而已,不是我要的
    标题1,n1,1.jpg,85.00
    标题2,n2,2.jpg,155.00
    标题3,n3,3.jpg,49.00
    标题4,n4,4.jpg,75.00

    只是取出了所有数据而已,不是我要的
    标题1,n1,1.jpg,85.00
    标题2,n2,2.jpg,155.00
    标题3,n3,3.jpg,49.00
    标题4,n4,4.jpg,75.00
    你的数据结构就是如此,所以说让你行列转换一下,或者按#4写的

    对于数据

    $ar = array(  "title" => array("标题1", "标题2", "标题3", "标题4"),  "id" => array("n1", "n2", "n3", "n4"),  "pic" => array("1.jpg", "2.jpg", "3.jpg", "4.jpg"),  "price" => array("85.00", "155.00", "49.00", "75.00"),);
    Copy after login
    方法1:
    foreach($ar['id'] as $i=>$r) {  echo <<< HTML<li><a href="$r" /><img  src="/static/imghw/default1.png"  data-src="{$ar['pic'][$i]}"  class="lazy"  pic'][$i]}"/ alt="总是搞不懂foreach怎么这样遍历这样的数组" >{$ar['title'][$i]}<em>{$ar['price'][$i]}</em></a></li>HTML;}
    Copy after login
    方案2
    foreach(array_map(null, $ar['id'], $ar['pic'], $ar['title'], $ar['price']) as $i=>$r) {  echo <<< HTML<li><a href="$r[0]" /><img  src="/static/imghw/default1.png"  data-src="$r[1]"  class="lazy"  / alt="总是搞不懂foreach怎么这样遍历这样的数组" >$r[2]<em>$r[3]</em></a></li>HTML;}
    Copy after login
    均可输出
    <li><a href="n1" /><img  src="/static/imghw/default1.png"  data-src="1.jpg"  class="lazy"  / alt="总是搞不懂foreach怎么这样遍历这样的数组" >标题1<em>85.00</em></a></li><li><a href="n2" /><img  src="/static/imghw/default1.png"  data-src="2.jpg"  class="lazy"  / alt="总是搞不懂foreach怎么这样遍历这样的数组" >标题2<em>155.00</em></a></li><li><a href="n3" /><img  src="/static/imghw/default1.png"  data-src="3.jpg"  class="lazy"  / alt="总是搞不懂foreach怎么这样遍历这样的数组" >标题3<em>49.00</em></a></li><li><a href="n4" /><img  src="/static/imghw/default1.png"  data-src="4.jpg"  class="lazy"  / alt="总是搞不懂foreach怎么这样遍历这样的数组" >标题4<em>75.00</em></a></li>
    Copy after login

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