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我对 PHP 比较陌生，希望你能帮我解决我的问题。我正在从数据库中选择数据到一个数组中以进行计时。最终，我想计算给定客户在项目上花费的总小时数。

这是填充多维数组的代码：...

foreach ($record as $data) {  
  $mArray = array();  
  $name = $data['user'];  
  $customer = $data['customer'];  
  $project = $data['project'];  
  $hours = $data['hours'];  

  $mArray[$name][$customer][$project] += $hours;  
}

...

我现在想遍历 $mArray 以生成这样的 xml 文件：

...

foreach ($mArray as $username) {
  foreach ($mArray[$username] as $customerName) {
    foreach ($mArray[$username][$customerName] as $project ) {
        echo '<'.$username.'><'.$customerName.'><'.$project.'><hours>'.
           $mArray[$username][$customerName][$project].'</hours></'.$project.'>
           </'.$customerName.'></'.$username.'>';
    }
  }
}

这个嵌套的 foreach 不起作用。有人可以给我一些关于如何遍历这个结构的提示吗？感谢您的阅读！

更新：根据我目前收到的评论（感谢大家），我有：

foreach ($mArray as $userKey => $username) {
  foreach ($mArray[$userKey] as $customerKey => $customerName) {
    foreach ($mArray[$userKey][$customerKey] as $projectKey => $projectName) {
      echo '<name>'.$userKey.'</name>';
      echo "\n";
      echo '<customerName>'.$customerKey.'</customerName>';
      echo "\n";
      echo '<projectName>'.$projectKey.'</projectName>';
      echo "\n";
      echo '<hours>'.$mArray[$userKey][$customerKey][$projectKey].'</hours>';
      echo "\n";
    }
  }
}

现在只提供一次迭代（一行数据）。

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1 回答 1

5

Foreach 语法是foreach($array as $value). 您正在尝试将这些值用作数组键，但它们不是值 - 它们是子数组。你想要的是：

foreach($mArray as $username) {
   foreach($username as ...)

或者

foreach($mArray as $key => $user) {
   foreach($mArray[$key] as ...)
于 2012-09-12T19:38:15.593 回答