Php 按数组的解析值对数组进行计数

如何计算数组中的数组元素

$course = array(
            array(
                'course_name'=> 'HTML',
                'trainee'=> array(
                                array('trainee_name'=>'Hong Va'),
                                array('trainee_name'=>'Reaksmey SE')
                            )
            ),array(
                'course_name'=> 'Java',
                'trainee'=> array(
                                array('trainee_name'=>'Hong Va'),
                                array('trainee_name'=>'Reaksmey SE'),
                                array('trainee_name'=>'Sok Panha'),
                                array('trainee_name'=>'MAO Vannakpanha')
                            )
              )
);

我想要这样的结果：

HTML 2学员

Java 3学员

HTML

foreach($course as $c){
    echo $c['course_name']."(".count($c['trainee'])." trainees)";
    echo "<br />";
}

爪哇

---

使用foreach和count即可

  <?php
       $result = array(); // to handle with data later
       foreach($course as $arr) {
          $result[$arr['course_name']] = count($arr['trainee']);        
          // for output here
          echo $arr['course_name'].' ('.count($arr['trainee']).' trainees)<br>';
       }

---

试试这个-它还将根据受训人数使用正确的复数或单数

foreach ($course as $item)
{
    $count = count($item['trainee']);
    $word = ($count == 1) ? 'trainee' : 'trainees';
    echo $item['course_name'] . " ($count $word)"; 
    echo "<br>";
}

---

好吧，你想要。太好了！你想从我们这里得到什么？首先你要尝试，然后你会得到帮助。提示1：foreach+count。这基本上就是你需要解决的所有问题。我试过了，但仍然无法解决。@Lazy Developer:如果你不能解决这样一个琐碎的任务，那么你有可能需要从头开始学习php。否则，您将花费更多的时间搜索和等待答案，而不是编码。谢谢您的分享。

  <?php
       $result = array(); // to handle with data later
       foreach($course as $arr) {
          $result[$arr['course_name']] = count($arr['trainee']);        
          // for output here
          echo $arr['course_name'].' ('.count($arr['trainee']).' trainees)<br>';
       }

foreach ($course as $item)
{
    $count = count($item['trainee']);
    $word = ($count == 1) ? 'trainee' : 'trainees';
    echo $item['course_name'] . " ($count $word)"; 
    echo "<br>";
}