PHP:从 foreach 循环中的数组中获取键 [英] PHP: Get the key from an array in a foreach loop

问题描述

print_r($samplearr) 为包含 3 个项目的数组打印以下内容:

print_r($samplearr) prints the following for my array containing 3 items:

Array ( [4722] => Array ( [value1] => 52 [value2] => 46 )
Array ( [4922] => Array ( [value1] => 22 [value2] => 47 )
Array ( [7522] => Array ( [value1] => 47 [value2] => 85 )

我想把这些放到一个 HTML 表格中，所以我做了一个 foreach 但它没有做我期望的:

I want to put these into an HTML table so I was doing a foreach but its not doing what I expected:

foreach($samplearr as $item){
     print "<tr><td>" . key($item) . "</td><td>" . $samplearr['value1'] . "</td><td>" . $samplearr['value2'] . "</td></tr>";
}

返回的是:

<tr><td>value1</td><td>52</td><td>46</td></tr>

这将是我想要的第一个输出:

This would be the first output I am wanting:

<tr><td>4722</td><td>52</td><td>46</td></tr>

我需要使用什么函数来代替 key($item) 来获取 4722?

What function do I need to be using instead of key($item) to get the 4722?

推荐答案

试试这个:

foreach($samplearr as $key => $item){
  print "<tr><td>" 
      . $key 
      . "</td><td>"  
      . $item['value1'] 
      . "</td><td>" 
      . $item['value2'] 
      . "</td></tr>";
}

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