PHP邮件代码不起作用

Question

This is my current code. Why is it not working? It sends mail, but in the $message section it doesn't pull from $name, $phone, or $email. Also, on the email itself, the $from doesn't work. The only thing that works correctly is $to and $subject.

<?php 
if(isset($_POST['submit'])){
$to = "[e-mail]";
$from = $_POST['email']; 
$name = $_POST['name'];
$subject = "Form submission";
$phone = $_POST['phone'];
$email = $_POST['email'];
$message = $name . " " . $phone . " has the email:" . "

" . $_POST['email'];

$headers = "From: <".$from. ">" ;
mail($to,$subject,$message,$headers);
echo "We have Recieved your Enquiry, We will get back to you soon. We Appreciate Your Patient Thank You.";
}
?>


<div class="right-wrapper">
                <div class="contact-form">
                    <p class="contact-form-info">Leave your contact info below, and we'll contact you shortly:</p>
                    <form action="https://www.forevrmarketing.com/webdesigndemo/eddy1155/functions/send-mail.php" method="post">
                    <input type="text" placeholder="Name" class="name" name="name" id="name">
                    <input type="email" placeholder="Email" class="email" class="email" id="email">
                    <input type="number" placeholder="Phone" id="phone" class="phone" class="phone" oninput="this.value=this.value.replace(/[^\d]/,'')" maxlength="15">
                    <input class="submit" type="submit" name="submit" value="Submit">

                    <div class="loader" disabled><i class="fa fa-spin fa-spinner" aria-hidden="true"></i></div>
                    <p class="form-details form-era">Call us at <strong style="font-weight: 600">[phone]</strong> Or <br><span class="wts"><img src="img/icon.png" alt="WhatsApp Icon"></span> <strong style="font-weight: 600">Whatsapp</strong> us</p>
                    <p class="reponse"></p>
                </div>
            </div>

Answer 1

Two fields in your form are missing name attributes and thus cannot be referenced as $_POST['email'] and $_POST['phone'].

<input type="email" placeholder="Email" class="email" class="email" id="email">
<input type="number" placeholder="Phone" id="phone" class="phone" class="phone" oninput="this.value=this.value.replace(/[^\d]/,'')" maxlength="15">

should be

<input type="email" placeholder="Email" name="email" class="email" id="email">
<input type="number" placeholder="Phone" id="phone" name="phone" class="phone" oninput="this.value=this.value.replace(/[^\d]/,'')" maxlength="15">

This should solve $from, $phone and $email being empty.

Also, in your $message line you could replace $_POST['email'] with $email.

Finally, add a closing </form> to your code.