Untitled

<?php

    if($_POST)
    {
        $errors = array();
        //start validations
        if(empty($_POST['firstName']))
        {
            $errors['firstName1'] = "Your first name needs to be completed";
        }
        if(empty($_POST['lastName']))
        {
            $errors['lastName1'] = "Your last name needs to be completed";
        }
        if(empty($_POST['email']) || !filter_var($_POST['email'], FILTER_VALIDATE_EMAIL))
        {
            $emailErr = "Invalid email format";
            $errors['email1'] = "Invalid email format";
        }
        if(empty($_POST['phoneNumber']))
        {
            $errors['phoneNumber1'] = "Your phone number needs to be completed";
        }
        if(empty($_POST['choice']))
        {
            $errors['choice1'] = "You have to do a choice";
        }
        if(empty($_POST['msg']))
        {
            $errors['msg1'] = "Your message needs to be completed";
        }

        //check errors
        if(count($errors) == 0)
        {
            //success page
            header("Location: success.php");
            exit();
        }
    }

?>

<!DOCTYPE html>
<html lang="en">
    <head>
        <meta charset="UTF-8">
        <title>Form !</title>
    </head>
    <body>
        <form action="form.php" method="post" target="">
            <h2 class="title">Contact us</h2>
            <div>
                <label for="firstName">First name </label>
                <input type="text" placeholder="Hugo" name="firstName" id="firstName" value="<?php if(isset($_POST['firstName'])) echo $_POST['firstName']; ?>" required/>
            </div>
            <p><?php if(isset($errors['firstName1'])) echo $errors['firstName1']; ?></p>
            <div>
                <label for="lastName">Last name </label>
                <input type="text" placeholder="Gehl" name="lastName" id="lastName" value="<?php if(isset($_POST['lastName'])) echo $_POST['lastName']; ?>" required/>
            </div>
            <p><?php if(isset($errors['lastName1'])) echo $errors['lastName1']; ?></p>
            <div>
                <label for="email">Email </label>
                <input type="email" placeholder="hugogehl@exemple.com" name="email" id="email" value="<?php if(isset($_POST['email'])) echo $_POST['email']; ?>" required/>
            </div>
            <p>
                <style>
                    p {
                        color: red;
                    }
                </style>
                <?php if(isset($errors['email1'])) echo $errors['email1']; ?>
            </p>
            <div>
                <label for="phoneNumber">Phone number </label>
                <input type="tel" placeholder="0625234595" name="phoneNumber" id="phoneNumber" value="<?php if(isset($_POST['phoneNumber'])) echo $_POST['phoneNumber']; ?>" required pattern="^((\+\d{1,3}(-| )?\(?\d\)?(-| )?\d{1,5})|(\(?\d{2,6}\)?))(-| )?(\d{3,4})(-| )?(\d{4})(( x| ext)\d{1,5}){0,1}$"/>
            </div>
            <p><?php if(isset($errors['phoneNumber1'])) echo $errors['phoneNumber1']; ?></p>
            <div>
                <label for="choice">Do your choice</label>
                <select id="choice" name="choice" required>
                    <option value="">-- Do your choice --</option>
                    <option value="Subject one">Subject one</option>
                    <option value="Subject two">Subject two</option>
                    <option value="Subject three">Subject three</option>
                </select>
            </div>
            <p><?php if(isset($errors['choice'])) echo $errors['choice1']; ?></p>
            <div>
                <label for="msg">Message </label>
                <textarea placeholder="Your message" id="msg" name="msg" required></textarea>
            </div>
            <p><?php if(isset($errors['msg1'])) echo $errors['msg1']; ?></p>
            <div  class="button">
                <button type="submit" value="submit">Send !</button>
            </div>
        </form>
    </body>
</html>