Question

我正在从用户那里读取大量数据，并将它们添加为关联数组，以便能够加入数据。下面给出了正确的数组值，但结果得到0。

<?php
    $userID = array();
    $blogusers = get_users( 'orderby=nicename&role=author' );
    foreach ( $blogusers as $user ) {
      $gender = 'sesso';
      $single = true;
      $the_user_id = $user->ID;
      array_push($userID, $the_user_id);
      $myUsers = $user->user_description;
      $user_sex = get_user_meta( $the_user_id, $gender, $single ); 
      $users[$user->ID] = array( "description" => $myUsers  , "gender" => $user_sex ); 
    }
    $roles = array();
    foreach($users as $id => $values){
        $temp_roles = explode(',', $values['description']);
        foreach($temp_roles as $k => $v){
          $roles[trim($v)][$values['gender']][] = true;
        }
    }

    ?>
  <ul class="margin-top-20">
    <?php
      foreach($roles as $skill => $genderB) {
          $males = count($genderB['male']);
          $females = count($genderB['female']);
          $total = $males + $females;
          echo $females;
          echo "<li>We have ".$total." ".$skill." teachers, ".$males." males, ".$females." females</li>";
      }
    ?>
  </ul>

如果我0我得到echo $females;并且字符串全部获得0作为值

我们有0位弗兰西老师，0位男性，0位女性

如果我在第一个foreach结束时print_r($users[$user->ID] );，我会得到正确的结果

Array ( [description] => francese, chimica, fisica, scienze [gender] => Array ( [0] => maschio ) ) Array ( [description] => inglese, fisica, chimica, spagnolo [gender] => Array ( [0] => maschio ) ) Array ( [description] => francese, fisica, italiano [gender] => Array ( [0] => femmina ) )

如果我在第二个foreach结束时print_r($roles);我只获得角色值而不是性别

Array ( [francese] => Array ( ) [chimica] => Array ( ) [fisica] => Array ( ) [scienze] => Array ( ) ) Array ( [francese] => Array ( ) [chimica] => Array ( ) [fisica] => Array ( ) [scienze] => Array ( ) [inglese] => Array ( ) [spagnolo] => Array ( ) ) Array ( [francese] => Array ( ) [chimica] => Array ( ) [fisica] => Array ( ) [scienze] => Array ( ) [inglese] => Array ( ) [spagnolo] => Array ( ) [italiano] => Array ( )

如果我在第二个foreach结束时print_r($temp_roles);再次获得

Array ( [0] => francese [1] => chimica [2] => fisica [3] => scienze ) Array ( [0] => inglese [1] => fisica [2] => chimica [3] => spagnolo ) Array ( [0] => francese [1] => fisica [2] => italiano )

我不明白为什么我在最后得到所有这些值的0值

Answer 1

在您的数据中，性别由femmina和maschio定义。在您的代码中，您需要检查female和male。

我发现的另一个问题是你不需要男女教师。如果您打开错误报告，使用此代码即可获得

Undefined index: female（或男性）

如果没有女性。您可以$females = isset($genderB['female']) ? count(genderB['female']): 0;围绕它进行工作。或者通过“完整”if当然声明。

为什么数组值为0？

1 个答案: