如何通过php脚本将多个输入从表单发送到电子邮件

所以我有这个小的 php 脚本，它在表单完成后将信息发送到我的电子邮件。我能够使其与一个输入一起工作，但是，当尝试指定 3 个不同的输入时，它不会通过。

我怀疑可能我没有在 if 语句的开头使用 isset 指定输入。我对 php 很陌生，很感激我能得到的所有帮助，无论如何这里是代码。

       <?php

    if (isset($_POST['name' && 'emailq' && 'message'])){
  $visitor_name = $_POST['name'];
  $visitor_email = $_POST['emailq'];
  $visitor_message = $_POST['message'];

  $email_from = "LightDesigns";
  $email_subject = "new quot";
  $email_body = "Name: " .$visitor_name."\nEmail: " .$visitor_email."\n\n" 
 .$visitor_message;

  $to = "[email protected]";
  $headers = "From: $email_from \r\n";
  $headers .= "Reply-To: $visitor_email \r\n";
  $result = mail($to,$email_subject,$email_body,$headers);
}
?>

<?php
$link_address = 'www.light-designsonline.co.uk';
if ($result){
    echo '<link href="css/phpcss.css" rel="stylesheet">';
    echo "<header></header>";
    echo '<h1>Thank You!</h1>';
    echo "<p>I'll get in contact with you shortly.</p>";

 }else{
    echo '<link href="css/phpcss.css" rel="stylesheet">';
    echo "<header></header>";
  ?>
  }
 <?php
  }
?>

<form action="quotform.php" method="POST" class="quote" name="quot">
        <div>
        <h1>Get a quot</h1>
        <hr align="left" style="width: 82%;">
            <label>Name</label><br>
            <input type="text" placeholder="Name" class="form" autocomplete required name="name">
                </div>
                    <div>
                        <label>Email</label><br>
                        <input type="email" placeholder="Email Address" class="form" autocomplete required name="emailq"> 
                    </div>
                <div>
            <label>Message</label><br>
            <textarea placeholder="Message" name="message"></textarea>
        </div>
            <button class="button_1" type="submit" class="form"><span>Send</span></button>
    </form>