PHP多维数组基于键提取特定值 [英] PHP Multidimensional Array Extract Specific Values Based Upon Key

问题描述

我正在尝试通过基于键提取特定的数组值来创建锚链接。我试过在for循环内使用foreach循环，但是似乎不起作用。

基于下面的多维数组，我如何遍历每个数组子数组以创建单个锚链接，例如：

示例：

  / *数组示例* / 
 
 array（3）{
 [0] => 
 array（2）{
 [ @attributes] => 
 array（1）{
 [ id] => string（1） 2 
} 
 [ name] => string（10） Mark 
} 
 [1] => 
 array（2）{
 [ @attributes] => 
 array（1）{
 [ id] => string（1） 4 
} 
 [ name] => string（8） John 
} 
 [2] => 
 array（2）{
 [ @attributes] => 
 array（1）{
 [ id] => string（1） 5 
} 
 [ name] => string（10） Suzy 
} 
 
 / *所需输出* / 
 
< a href = example.com?id=2&name=标记标记< / a> 
< a href = example.com?id=4&name=john>约翰< / a> 
< a href = example.com?id=5&name=mark> Suzy< / a> 
  

解决方案

假设您发布的数组是a的内容变量$ users。您可以执行以下操作来遍历它：

  foreach（$ users为$ usr）
 {
 $ usr ['@attributes'] ['id']; 
 $ usr [’name’]; 
} 
  

这样，您可以遍历每个节点而不必担心索引。 / p>

您可以通过几种方式在每个foreach迭代中输出链接。一个完整的示例（允许使用HTML而不必转义每个特殊字符）可以是：

 <？php 
 foreach（$ users as $ usr）
 {？> 
< a href = example.com?id=<?php echo $ usr ['@ attributes'] ['id'];？>& name =<？php echo $ usr [ 'name'];？>><？php echo $ usr ['name']; < / a> 
 
<？php}？> 
  

虽然它看起来很复杂，但带有许多PHP的打开和关闭标签，但在标记，几乎没有性能损失

I'm trying to create an anchor link by extracting specific array values based upon based upon the key. I've tried using a foreach loop inside of a for loop, however that doesn't seem to work.

Based upon the below multidimensional array how can I loop through each subarray to create individual anchor links, such as:

Example:

    /* Array Example */

    array(3) {
          [0]=>
              array(2) {
                ["@attributes"]=>
                    array(1) { 
                        ["id"] => string(1) "2"
                    }
                ["name"]=> string(10) "Mark"
              }
          [1]=>
              array(2) {
                ["@attributes"]=>
                    array(1) {
                      ["id"]=> string(1) "4"
                    }
                ["name"]=> string(8) "John" 
              }
          [2]=>
              array(2) {
                ["@attributes"]=>
                    array(1) {
                      ["id"]=> string(1) "5"
                    }
                ["name"]=> string(10) "Suzy"
              }

    /* Desired Output */

    <a href="example.com?id=2&name=mark"> Mark </a>
    <a href="example.com?id=4&name=john"> John </a>
    <a href="example.com?id=5&name=mark"> Suzy </a>

解决方案

Let's assume the array you posted is the content of a variable called $users. You can walk through it by doing

foreach ($users as $usr)
{
  $usr['@attributes']['id'];
  $usr['name'];
}

This way, you can go through every node without worrying about the indexes.

You may output the link on each foreach iteration in several ways. A complete example (which allows to use HTML without escaping every special character) could be:

<?php
foreach ($users as $usr)
{ ?>
  <a href="example.com?id=<?php echo $usr['@attributes']['id']; ?>&name=<?php echo $usr['name']; ?>"><?php echo $usr['name']; ?></a>

<?php } ?>

While it looks complex, with a lot of PHP opening and closing tags, it makes it easier on the markup with almost no performance penalty

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