将复选框值传递给 javascript 和 PHP 邮件

Question

我正在尝试将复选框值传递给 PHP，但兴趣字段显示为空白。我删除了 javascript 验证并将其直接发送到 PHP。所有其他字段都显示正常。我只想列出选中的复选框。

HTML
====================================
<fieldset>
<input type="checkbox" name="interests[]" value="Workout" /><label for="workout">Workout</label><br />
<input type="checkbox" name="interests[]" value="Practice" /><label for="practice">Practice</label><br />
<input type="checkbox" name="interests[]" value="Training" /><label for="practice">Training</label><br />
</fieldset>

PHP
====================================
<?php

$field_full_name = $_POST['names'];

if(isset($_POST['interests'])){
$field_interests = 'interests';
}


$mail_to = 'me@mail.com';

$subject = 'Message from a visitor '.$field_full_name;

$body_message = 'From: '.$field_full_name."\n";

$body_message .= 'Interest: '.$field_interests."\n";

$headers = 'From: '.$field_email."\r\n";

$headers .= 'Reply-To: '.$field_email."\r\n";

$mail_status = mail($mail_to, $subject, $body_message, $headers);


if ($mail_status) { ?>
    <script language="javascript" type="text/javascript">
        window.location = 'index.html';
    </script>
<?php
}
else { ?>
    <script language="javascript" type="text/javascript">
        window.location = 'index.html';
    </script>
<?php
}
?>

Answer 1

那是因为它是一个数组，而不是一个标量值；或者至少直到你用一个字符串替换它。替换这个：

$field_interests = 'interests';

与

$field_interests = (is_array($_POST['interests']) ? $_POST['interests'] : []);
$field_interests = (count($field_interests) > 0 ? implode(',', $field_interests) : 'none');

虽然您也确实阅读了有关将原始字符串安全地转换为 html 的内容，但您一定会在使用这些行的过程中产生大量错误

$body_message = 'From: '.$field_full_name."\n";

使用htmlentities 或htmlspecialchars 将字符串编码为html，

$body_message = 'From: ' . htmlentities($field_full_name) . "\n";

或者更好，

$body_message = sprintf('From: %s' . PHP_EOL, htmlentities($field_full_name) );