PHP/Codeigniter比較對象（stdClass）和字符串數組array_intersect

Question

我是一種PHP和Codeigniter的新手。我想比較2個不同的數組（一個用字符串和一個用對象（stdClass）），並計算它們的相似值，來計算結果。是否有任何可能解決這個問題，比如轉換對象？爲字符串，反之亦然任何幫助將不勝感激

這是一些代碼我現在所擁有的：

Result.php

$countcorrectuser = count(array_intersect($_SESSION['correctanswers'], $_SESSION['useranswers'])); 
$countcorrect = count($_SESSION['correctanswers']); 
$totalresult = $countcorrectuser/$countcorrect; 
$this->session->set_userdata('totalresult', $totalresult); 

Run.php

// $_SESSION['correctanswers'] 
$correctanswers = $this->Question_model->getAllAnswers(); 
$this->session->set_userdata('correctanswers', $correctanswers); 

// $_SESSION['useranswers'] When the next question submit button is pressed 
if(!isset($_SESSION['useranswers'])){ 
    $_SESSION['useranswers'] = array(); 
} 
    $_SESSION['useranswers'][] = $this->input->post('useranswer'); 

Question_model.php的var_dump的

function getAllAnswers(){ 
    $query = $this->db->query('SELECT answer FROM question WHERE exam_id = \'' . $_SESSION['examid'] .'\''); 
    return $query->result(); 
} 

實施例（$ _ SESSION [ 'correctanswers']）;

array(4) { [0]=> object(stdClass)#25 (1) { ["answer"]=> string(6) "answer" } etc. 

var_dump（$ _ SESSION ['usersanswers']）;

array(4) { [0]=> string(6) "answer" etc. 

Answer 1

爲了便於閱讀，代碼中的一些更改。它還使用Query Binding以提高可讀性和安全性。

查詢結果使用foreach循環來創建一個匹配$_SESSION['usersanswers']結構的數組。

function getAllAnswers() 
{ 
    $sql = 'SELECT answer FROM question WHERE exam_id = ?'; 
    $answers = $this->db->query($sql, [$_SESSION['examid']])->result(); 
    $results = [];//empty array so there is always something to return 
    foreach($answers as $answer){ 
     $results[] = $answer->answer; 
    } 
    return $results; 
}