I'm just starting to learn PHP and my academic teacher gave my group a task to create a fully functional site that stores data about some fictitious scientific publications. My task from now is to implement functionality about adding a new publication to a database. Here lies my problem. Another person in my group created a front end part of a site in jquery that creates rows to input data about an author of an article. We are adding his name,surname,affiliation and his share(%) in creating an article. It looks like this:
Database:
Code for function that creates new rows :
$(document).ready(function () {
    $(".add-row").click(function () {
        var authorFirstname = $("#authorFirstname").val();
        var authorLastname = $("#authorLastname").val();
        var authorAffiliation = $("#authorAffiliation").val();
        var authorPercentage = $("#authorPercentage").val();
        var markupSearch = "<tr><td><input type='checkbox' name='record'></td><td>" + authorFirstname + "</td><td>" + authorLastname + "</td><td>" + authorAffiliation + "</td></tr>";
        var markupAdd = "<tr><td><input type='checkbox' name='record'></td><td>" + authorFirstname + "</td><td>" + authorLastname + "</td><td>" + authorAffiliation + "</td><td>" + authorPercentage + "%</td></tr>";
        $("table.markupSearch tbody").append(markupSearch);
        $("table.markupAdd tbody").append(markupAdd);
    });
    $(".delete-row").click(function () {
        $("table tbody").find('input[name="record"]').each(function () {
            if ($(this).is(":checked")) {
                $(this).parents("tr").remove();
            }
        });
    });
});Then we have a form:
<div class="container page-content search">
    <div class="row">
        <div class="col-md-12">
            <h1 class="header">Dodaj publikację</h1>
        </div>
    </div>
    <div class="row">
        <div class="col-md-10 mx-auto">
           
            <form method="post">
                <div class="form-row">
                    <div class="col">
                        <div class="md-form">
                            <input type="text" id="addTitlePublication" name="title" class="form-control">
                            <label for="addTitlePublication">Tytuł publikacji</label>
                        </div>
                    </div>
                </div>
                <div class="form-row">
                    <div class="col">
                        <div class="md-form">
                            <input type="date" id="addDate" name="date" class="form-control">
                            <label for="addDate">Data publikacji</label>
                        </div>
                    </div>
                    <div class="col">
                        <div class="md-form">
                            <input type="number" id="addDOI" name="doi" class="form-control">
                            <label for="addDOI">DOI</label>
                        </div>
                    </div>
                    <div class="col">
                        <div class="md-form">
                            <input type="number" min="1" max="1000" id="addMinisterialPoints" name="points" class="form-control">
                            <label for="addMinisterialPoints">Punkty ministerialne</label>
                        </div>
                    </div>
                </div>
                <div class="form-row">
                    <h5 class="mt-3">Miejsce publikacji:</h5>
                </div>
                
                <div class="form-row">
                    <div class="col">
                        <div class="md-form">
                            <input type="text" id="publicationMagazine" name="magazine" class="form-control"  required>
                            <label for="publicationMagazine">Nazwa czasopisma</label>
                        </div>
                    </div>
                    <div class="col">
                        <div class="md-form">
                            <input type="text" id="publicationConference" name="conference" class="form-control" required>
                            <label for="publicationConference">Nazwa konferencji</label>
                        </div>
                    </div>
                </div>
                <h4 class="mt-5">Autorzy publikacji</h4>
                <table class="authors markupAdd">
                    <thead>
                        <tr>
                            <th><button type="button" class="delete-row" title="Usuń wybranych autorów"><i class="fas fa-trash-alt"></i></button></th>
                            <th>Imię</th>
                            <th>Nazwisko</th>
                            <th>Afiliacja</th>
                            <th>Udział procentowy</th>
                        </tr>
                    </thead>
                    <tbody>
                        <tr>
                        </tr>
                    </tbody>
                </table>
                <h5 class="mt-3">Dodawanie nowego autora:</h5>
                <div class="form-row">
                    <div class="col-md-3">
                        <div class="md-form">
                            <input type="text" id="authorFirstname" name="name" placeholder="Imię" class="form-control">
                            <label for="authorFirstname"></label>
                        </div>
                    </div>
                    <div class="col-md-3">
                        <div class="md-form">
                            <input type="text" id="authorLastname" name="surname" placeholder="Nazwisko" class="form-control">
                            <label for="authorLastname"></label>
                        </div>
                    </div>
                    <div class="col-md-3">
                        <div class="md-form">
                            <input type="text" id="authorAffiliation" name="afiliation" placeholder="Afiliacja" class="form-control">
                            <label for="authorAffiliation"></label>
                        </div>
                    </div>
                    <div class="col-md-2">
                        <div class="md-form">
                            <input type="number" min="1" max="100" id="authorPercentage" name="share" placeholder="Udział procentowy" class="form-control">
                            <label for="authorPercentage"></label>
                        </div>
                    </div>
                    <div class="col-md-1">
                        <div class="md-form">
                            <button type="button" class="btn btn-add add-row mb-4"><i class="fas fa-plus"></i></button>
                        </div>
                    </div>
                </div>
                <div class="text-center text-md-left mt-3">
                    <button class="btn btn-dark">Dodaj publikację</button>
                </div>
            </form>
            
        </div>
    </div>
</div>And my code for adding basic data:
<php
if ($_SERVER["REQUEST_METHOD"] == "POST")
{
    $conn = getDB();
    
    $sql = "INSERT INTO records (title, date, conference, doi, points)
            VALUES ('" . $_POST['title'] . "','" . $_POST['date'] . "','" . $_POST['conference'] . "','" . $_POST['doi'] . "','" . $_POST['points'] . "')";
    $sqla = "INSERT INTO authors (name, surname, afiliation, share) VALUES ('" . $_POST['name'] . "','" . $_POST['surname'] . "','" . $_POST['afiliation'] . "','" . $_POST['share'] . "')";
    $results = mysqli_query($conn, $sql);
    $results = mysqli_query($conn, $sqla);
    if ($results === false) {
        echo mysqli_error($conn);
    } else {
        $id = mysqli_insert_id($conn);
        echo "added record id: $id";
    }
}
?>Could someone please help me understand how to insert that data from these rows to a database? And how to link authors of an article with an article itself. Another thing, maybe I structured my database wrong and I need some changes there?
All in all thank you for your answers in advance. Please forgive me my English if I made any mistakes. I tried to decribe my problem as clearly as I could.
My question is different to This answer. I know basics for insert statement. I don't know how to insert data from dynamically generated table rows, which are made the way I have shown. If I try to make a basic insert statement, it only adds first row of a Author's(Autorzy Publikacji) table.


