如何将for循环放入变量中？

Question

所以，我有一个网站，我想向用户显示测试结果，但我也想将这些相同的结果通过电子邮件发送给评分者。我必须向用户显示结果的代码如下：

for($i=1; $i<=$totalquest; $i++){
    if($_POST[$i]!=$correct[$i]){
        echo "You answered Question $i incorrectly:<br> $question[$i] <br> You answered: $_POST[$i] <br> The correct answer is: $correct[$i]<p>";
        $score=$score-1;
    }
}

这段代码运行良好。

当我尝试创建包含该信息的电子邮件时出现问题。

到目前为止，我有这个：

$message = $_SESSION["firstname"]." ".$_SESSION["lastname"]."'s score is ".$score."/".$totalquest." which equals ".$percent." percent.\r\n\r\n".
"The questions ".$_SESSION["firstname"]." got wrong are as follows:\r\n\r\n";
mail($to, $subject, $message, $headers);

这行得通，但我无法理解如何将 for 循环放入 $message 变量中。本质上，我需要连接 for 循环的结果，创建一个字符串并将其放入 $message 变量中。但我迷路了！

Answer 1

只需将.= 用于$message，每次将新消息添加到旧消息（这也会在每个问题之间添加换行符）：

$message = $_SESSION["firstname"]." ".$_SESSION["lastname"]."'s score is ".$score."/".$totalquest." which equals ".$percent." percent.\r\n\r\n".
"The questions ".$_SESSION["firstname"]." got wrong are as follows:\r\n\r\n";
for($i=1; $i<=$totalquest; $i++){
    if($_POST[$i]!=$correct[$i]){
        $message .= "You answered Question $i incorrectly:<br> $question[$i] <br> You answered: $_POST[$i] <br> The correct answer is: $correct[$i]<p>\r\n";
        echo "You answered Question $i incorrectly:<br> $question[$i] <br> You answered: $_POST[$i] <br> The correct answer is: $correct[$i]<p>";
        $score=$score-1;
    }
}
mail($to, $subject, $message, $headers);

Answer 2

$emsg = "";  // email message
for($i=1; $i<=$totalquest; $i++){
    if($_POST[$i]!=$correct[$i])
    {
        $msg = "You answered Question $i incorrectly:<br> $question[$i] <br> You answered: $_POST[$i] <br> The correct answer is: $correct[$i]<p>";
        echo $msg;
        $emsg .= "<br/>\n" . $msg;
        $score=$score-1;
    }
}

$message = (the same stuff you have) . $emsg;