我试图将下面的数组转换为.csv文件，其中问题将在第一行，相应的答案在第二行，在开始时，时间戳应该与时间在沿着。
我试过以下几种方法：

<?php

  $qna = [
    [
      "questionNo"=> 1,
      "question"=> "I am the life of the party.",
      "answer"=> 2
    ],
    [
      "questionNo"=> 2,
      "question"=> "I feel little concern for others.",
      "answer"=> 4
    ],
    [
      "questionNo"=> 3,
      "question"=> "I am always prepared.",
      "answer"=> 2
    ],
    [
      "questionNo"=> 4,
      "question"=> "I get stressed out easily.",
      "answer"=> 4
    ]
  ];
  
  $csv = '/home/ankur/Desktop/iq_data.csv';
  $fp = fopen( $csv , 'w' );
  $questionarray = array();
  $answerarray = array();
  $keyarray = array();
  $valuearray = array();
  foreach( $qna as $key => $questions) {
   
   $questionarray[]  = $questions['question'];
   $answerarray[]    = $questions['answer'];
  }
  $keyarray[] = "Timestamp";
  $valuearray[] = time();
  
  $row = array();
  array_push($row,$keyarray);
  array_push($row,$valuearray);
  array_push($row,$questionarray);
  array_push($row,$answerarray);
  
  for($i=0; $i < count($row); $i++) {
    fputcsv($fp, $row[$i] );
  }
  
  fclose( $fp );
  
?>

它正在创建.csv文件，但时间戳及其值与问题答案不在同一行，如下所示：

Timestamp           
1676484864          
I am the life of the party. I feel little concern for others.   I am always prepared.   I get stressed out easily.
2   4   2   4

我希望Timestamp列与问题列在同一行中，如下所示：

Timestamp     I find it hard to imitate the behavior of other people.     My behavior is usually an expression of my true inner feelings, attitudes, and beliefs. 
12/3/21 14:05   TRUE    TRUE

如果可能的话，请建议我在哪里做错了。