无法完成简单的联系表格[关闭]

Question

I am a novice coder currently working on my very first php project. A website has a simple php contactform I'm trying to complete but I keep running into unexpected errors. I have tried many things now that I found on Stackoverflow and solved some errors myself, but I am at a loss right now. I hope someone would review my code to help me see what I'm missing here. Any help to get me back on track is much appreciated.

edit: tried to make this post more on topic

What I want this script to do:
- make name, email and message required fields
- make form secure against malicious intent. That is why I added the check_input function, following Securing a contact form script

Complete code as of now:

<?php

$name = isset($_POST['name']) ? check_input($_POST['name']) : ""; 
$email = isset($_POST['email']) ? check_input($_POST['email']) : ""; 
$company = isset($_POST['company']) ? check_input($_POST['company']) : ""; 
$message = isset($_POST['message']) ? check_input($_POST['message']) : ""; 
$from = 'From: ZZZ Reactieformulier';
$to = '[e-mail]';
$subject = 'Reactie via website';


$body = "Afzender: $name
 E-mailadres: $email
 Bedrijfsnaam: $company
 
Bericht: $message";

function check_input($data){
$data = trim($data);
$data = stripslashes($data);
$data = htmlspecialchars($data);
return $data;
}


if ($_POST['submit']) {
        if ($name !='' && $email !='' && $message !='') {
            if (mail ($to, $subject, $body, $from)) {
                echo '<p>Uw bericht is succesvol verzonden!</p>';
            } else {
                echo '<p>Er is iets misgegaan, probeer het alstublieft 
                         opnieuw</p>';
            }
        } else {
            echo '</p>De velden Naam, E-mail en Bericht zijn verplicht</p>';
        }

    }   
?>

Answer 1

Your ternary operator are wrong :

$name = isset($_POST['name']) ? check_input($_POST['name']);

should be

$name = isset($_POST['name']) ? check_input($_POST['name']) : "";