Untitled

<?php

$errors =[];

// Debut Validation

if ($_POST) {
    if (empty($_POST['lastname'])) {
        $errors['lastname'] = '* Nom invalide';
    }

    if (empty($_POST['firstname'])) {
        $errors['firstname'] = '* Prénom invalide';
    }

    if (empty($_POST['email'])) {
        $errors['email'] = "* Email invalide";
    }elseif(!filter_var($_POST['email'])){
        $errors['email'] = "* Ceci n'est pas un email";
    }
    if (empty($_POST['phone'])) {
        $errors['phone'] = '* Telephone invalide';
    }

    if ($_POST['subject'] == 'Unchoosen'){
        $errors['subject'] = '* Selectionnez un champ';
    }
    if (empty($_POST['message'])) {
        $errors['message'] = '* Message invalide';
    }

    // Check errors
    if(count($errors) == 0) {
        //Redirection vers page success
        header("location: success.php");
        exit();
    }
}
function test_input($data) {
    $data = trim($data);
    $data = stripslashes($data);
    $data = htmlspecialchars($data);
    return $data;
}

?>

<!DOCTYPE html>
<html lang="fr">

<head>
    <meta charset="UTF-8">
    <meta name="description" content="">
    <title>Formulaire</title>
    <meta name="viewport" content="width=device-width, initial-scale=1">
    <link rel="stylesheet" href="">
</head>

<body>
    <h1>Formulaire</h1>
    <form method="POST" enctype="multipart/form-data" action="">
        <p>
            <label for="lastname">Nom :</label>
            <input type="text" id="lastname" name="lastname" value="<?php if(isset($_POST['lastname'])) echo $_POST['lastname'];?>">
        </p>
        <p><?php if(isset($errors['lastname'])) echo $errors['lastname'];?></p>

        <p>
            <label for="firstname">Prénom :</label>
            <input type="text" id="firstname" name="firstname" value="<?php if(isset($_POST['firstname'])) echo $_POST['firstname'];?>">
        </p>
        <p><?php if(isset($errors['firstname'])) echo $errors['firstname'];?></p>

        <p>
            <label for="email">e-mail :</label>
            <input type="email" id="email" name="email" value="<?php if(isset($_POST['email'])) echo $_POST['email'];?>">
        </p>
        <p><?php if(isset($errors['email'])) echo $errors['email'];?></p>

        <p>
            <label for="phone">Télephone :</label>
            <input type="text" id="phone" name="phone" value="<?php if(isset($_POST['phone'])) echo $_POST['phone'];?>">
        </p>
        <p><?php if(isset($errors['phone'])) echo $errors['phone'];?></p>

        <p>
            <label for="subject">Sujet traité :</label>
            <select id="subject" name="subject" required>
                <option value = "Unchoosen">--Faire un choix--</option>
                <option value = "Sujet 1">Sujet 1</option>
                <option value = "Sujet 2">Sujet 2</option>
                <option value = "Sujet 3">Sujet 3</option>
            </select>
        </p>
        <p><?php if(isset($errors['subject'])) echo $errors['subject'];?></p>
        <p>
            <label for="msg">Message :</label>
            <textarea id="msg" name="message" rows="10" cols="30" required></textarea>
        </p>
        <p><?php if(isset($errors['message'])) echo $errors['message'];?></p>
        <div class="button">
            <button type="submit">Envoyer le message</button>
        </div>
    </form>

</body>
</html>