仅在数组中显示一个重复值，但显示所有其他值

Question

我可以只显示具有多个相同值的 foreach 数组中的一个值，而不像这样首先在查询中对数组进行分组吗：

0 => 
    array (size=10)
      'id' => string '1' (length=1)
      'questionname' => string 'question 01' (length=36)
      'answerspossible' => 
        array (size=3)
          0 => 
            array (size=2)
              ...
          1 => 
            array (size=2)
              ...
          2 => 
            array (size=2)
              ...
      'answer' => string 'YES' (length=3)
      'answer2' => string '' (length=0)
  1 => 
    array (size=10)
      'id' => string '1' (length=1)
      'questionname' => string 'question 01' (length=36)
      'answerspossible' => 
        array (size=3)
          0 => 
            array (size=2)
              ...
          1 => 
            array (size=2)
              ...
          2 => 
            array (size=2)
              ...
      'answer' => string 'YES' (length=3)
      'answer2' => string 'test answer' (length=0)

我想要在视图中的结果是按 foreach 内的问题分组：

question 01 :
          - answer & answer 2 
          - answer & answer 2

我的代码是：

foreach ($Questions as $Key => $Question) {

        echo $question['questionname'];
        echo $Question['answer']." & ".$Question['answer2'];

}

thnx 寻求帮助:)

Answer 1

$justblank = ''; // just a blank variable we will use it later.
foreach ($Questions as $Key => $Question) {
        echo $question['questionname'];
        $questionanswers = $Question['answer']." & ".$Question['answer2'];
        if($justblank == $questionanswers){
            break;
        }else{
            echo $questionanswers;
        }
        $justblank .= $questionanswers;
}

嗨穆罕默德，我希望这对你有帮助:)。

Answer 2

一个空白的 var 作品

$justblank = -1; 
foreach ($Questions as $Key => $Question) {
   if($Question['id']!=$justblank){
    echo $Question['questionname'];
    $justblank=$Question['id'];

   }
     ....
}

仅在数组中显示一个重复值，但显示所有其他值

Show duplicate value in array only one but show all others

php

arrays

foreach

filter-var