PHP表单电子邮件不发送

Question

I have written some PHP code for a contact form for my one page portfolio, when it is submitted it just opens up a blank page and also the e-mail isnt sent and the text is not echo'd out. I am not very confident with PHP as it is fairly new to me. if anyone could help that would be great?

html -

<form id="cont-form" method="post" action="mail.php">
<fieldset>
<legend>Send me a message</legend>
<ol>
        <li>
            <label for="name">Name</label>
            <input id="name" name="name" type="text" placeholder="First and last name" required autofocus>
        </li>
        <li>
            <label for="email">Email</label>
            <input id="email" name="email" type="email" placeholder="[e-mail]" required>
        </li>
        <li>
            <label for="phone">Phone</label>
            <input id="phone" name="phone" type="tel" placeholder="Eg. 07500000000" required>
        </li>
        <li>
            <label for="subject">Subject</label>
            <input id="subject" name="subject" type="text" placeholder="What the message is about" required>
        </li>
        <li>
        <label for="message">Message</label>
        <textarea id="message" name="message" placeholder="Insert your message or question here" rows="10" cols="50">
        </textarea>
        </li>
          <li>
        <label for="human">What is 2 + 2 ?</label>
        <input id="human" name="human" type="number" placeholder="Please insert answer" required>
        </li>
    </ol>
</fieldset>
<fieldset>
    <input class="button" id="submit" type="submit" value="Send it!">
</fieldset>
</form>

php -

<?php
$name = $_POST['name']; //'name' has to be the same as the name value on the form input element
$email = $_POST['email'];
$message = $_POST['message'];
$from = 'From: $email'; 
$to = '[e-mail]'; //set to the default email address
$subject = $_POST['subject'];
$human = $POST['human'];    

$body = "From: $name
 E-Mail: $email
 Message:
 $message";

if ($_POST['submit'] && $human == '4') {                 
    if (mail ($to, $subject, $body, $from)) { //mail sends it to the SMTP server side which sends the email
    echo "<p>Your message has been sent!</p>";
} else { 
    echo "<p>Something went wrong, go back and try again!</p>"; 
} 
} else if ($_POST['submit'] && $human != '4') {
echo "<p>You answered the anti-spam question incorrectly!</p>";
}
?>

Answer 1

There were a few things wrong with your form and handler.

In your HTML form, you did not have an input for human so I added that, plus your submit button was not named, so that alone would not have worked.

<input class="button" id="submit" name="submit" type="submit" value="Send it!">

And in your PHP handler, your (mail headers) were improperly formatted, so that ended up in my SPAM box so I added that as well.

$from = $_POST['email'];

as well as headers plus I fixed your last condition to:

if (!isset($_POST['submit']) && ($_POST['human']) != '4')

HTML form

<form id="cont-form" method="post" action="mail.php">
<fieldset>
<legend>Send me a message</legend>
<ol>
    <li>
        <label for="name">Name</label>
        <input id="name" name="name" type="text" placeholder="First and last name" required autofocus>
    </li>
    <li>
        <label for="email">Email</label>
        <input id="email" name="email" type="email" placeholder="[e-mail]" required>
    </li>
    <li>
        <label for="phone">Phone</label>
        <input id="phone" name="phone" type="tel" placeholder="Eg. 07500000000" required>
    </li>
    <li>
        <label for="subject">Subject</label>
        <input id="subject" name="subject" type="text" placeholder="What the message is about" required>
    </li>


      <li>
    <label for="human">What is 2 + 2 ?</label>
    <input id="human" name="human" type="number" placeholder="Please insert answer" required>
    </li>

    <li>
    <label for="message">Message</label>
    <textarea id="message" name="message" placeholder="Insert your message or question here" rows="10" cols="50">
    </textarea>
    </li>
    </ol>
</fieldset>
<fieldset>
    <input class="button" id="submit" name="submit" type="submit" value="Send it!">
</fieldset>
</form>

PHP handler, tested and working for you.

<?php
$name = $_POST['name']; //'name' has to be the same as the name value on the form input element
$email = $_POST['email'];
$message = $_POST['message'];
$human = $_POST['human'];
$from = $_POST['email'];
$to = '[e-mail]'; //set to the default email address
$subject = $_POST['subject'];
$body = "From: $name
 E-Mail: $email
 Message:
 $message";

$headers = "From: $email" . "
" .
"Reply-To: $email" . "
" .
"X-Mailer: PHP/" . phpversion();

if(isset($_POST['submit']) && ($_POST['human']) == '4') {               
mail ($to, $subject, $body, $headers);  //mail sends it to the SMTP server side which sends the email
    echo "<p>Your message has been sent!</p>";
} 

else { 
    echo "<p>Something went wrong, go back and try again!</p>"; 
} 
if (!isset($_POST['submit']) && ($_POST['human']) != '4') {
echo "<p>You answered the anti-spam question incorrectly!</p>";
}
?>