PHP sends email on page load - php

Question

<?php
// configure
$from = 'Demo contact form <demo#domain.com>';
$sendTo = '105 Questions <myemail#example.com>';
$subject = 'New message from contact form';
$fields = array('name' => 'Name', 'surname' => 'Surname', 'phone' => 'Phone', 'email' => 'Email', 'message' => 'Message'); // array variable name => Text to appear in email
$okMessage = 'Contact form successfully submitted. Thank you, I will get back to you soon!';
$errorMessage = 'There was an error while submitting the form. Please try again later';
// let's do the sending
try
{
$emailText = "You have new message from the website\n=============================\n";
foreach ($_POST as $key => $value) {
if (isset($fields[$key])) {
$emailText .= "$fields[$key]: $value\n";
}
}
mail($sendTo, $subject, $emailText, "From: " . $from);
$responseArray = array('type' => 'success', 'message' => $okMessage);
}
catch (\Exception $e)
{
$responseArray = array('type' => 'danger', 'message' => $errorMessage);
}
if (!empty($_SERVER['HTTP_X_REQUESTED_WITH']) && strtolower($_SERVER['HTTP_X_REQUESTED_WITH']) == 'xmlhttprequest') {
$encoded = json_encode($responseArray);
header('Content-Type: application/json');
echo $encoded;
}
else {
echo $responseArray['message'];
}
This is where I get a little confused some code end with just } and I got errors.
But when I add ?> it works, but also sends an email on page load.
In another post I read they fixed it with isset but when I put it before the "configure comment" an email was still sent on page load.

Answer 1

Basic logic - don't send the message unless you're handling a form submission rather than a page load.
if (isset($_POST['name'])) { //This will not be true on a page load
//Your existing script goes here
}