PHP Adding elements with the array to database not working - php

Question

I have array which get all E-mails which are invited by the user before. I checking which e-mails are selected by checkbox and then I add them to the table 'zaproszenia'. The array saves the records. When i click the button 'Zapisz'(SAVE) I have error:
Notice: Undefined offset: 1 in D:\xampp\xampp\htdocs\inzynierka\inzynierka\zaproszenia.php on line 91
This line is:
$tabMail=$mail_array[$i];
I want save to the table 'zaproszenia' the e-mail which is select by checkbox. I have no idea how do that. I was trying and trying and nothing.Sorry about my english. I hope that I describing the problem clear.
Code fragment with file: zaproszenia.php - List the emails and checkboxes for them:
<form method="post">
<table class="table table-striped">
<thead>
<tr>
<th>Email_goscia</th>
<th>Imię</th>
<th>Nazwisko</th>
<th>Kod_dostepu</th>
<th>Data ważności kwest.</th>
</tr>
</thead>
<tbody>
<?php
$sqlc=mysqli_connect('127.0.0.1','root','');
if($sqlc)
{
$sql_q="USE aplikacja";
mysqli_query($sqlc,$sql_q);
//wyświetlanie listy gości dodanych przez uzytkownika globalnie tzn. to jest lista z ktrej uzytkownik wybiera ktrych gosci chce zaprosić do konkretnego kwestionariusza
$sql_q=mysqli_query($sqlc, "SELECT * FROM goscie g, uzytkownicy_goscie ug WHERE g.Email_goscia=ug.Email_goscia AND ug.Login='$log' ");
$lp=1;
if(mysqli_num_rows($sql_q) != 0)
{
$licznik=0;
while ($recordG=mysqli_fetch_array($sql_q))
{
?><tr>
<td> <?php echo $mail = $recordG['Email_goscia'];
$mail_array=array($licznik => $mail);
$licznik++; //$_SESSION['tablicaMail']=$mail_array; print_r($_SESSION);
print_r($mail_array);
?></td>
<td> <?php echo $recordG['Imie'];?> </td>
<td> <?php echo $recordG['Nazwisko']; ?> </td>
<td> <?php echo $recordG['Kod_dostepu'];?></td>
<td> <?php echo '<input type="date" name="data_waznosci'.$lp.'" id="data_waznosci'.$lp.'">'; ?> </td>
<td> <?php echo '<td><input type="checkbox" name="zaznaczyc'.$lp.'" id="zaznaczyc'.$lp.'" class="ClassZaznacz" onchange = "zaznacz();"/> <br /></td>'; ?> </td>
</tr>
<?php
$lp++;
}
}
else
{
echo "Użytkownik nie dodał jeszcze żadnych gości";
} ?>
</tbody>
</table>
<input type="submit" class="btn btn-primary" name="zapros" id="zapros" value="Zapisz zmiany" />
</form>
Save the selected emails by checkboxes:
<?php
if (isset($_POST['zapros']))
{
$data_zaproszenia = date("Y-m-d");
$liczba = count(preg_grep('/^data_waznosci[\d]*/', array_keys($_POST)));
echo $liczba;
if(mysqli_num_rows($sql_q) != 0)
{
for ($i=1; $i <= $liczba ; $i++)
{
/*while ($recordG=mysqli_fetch_array($sql_q)) {
$mail = $recordG['Email_goscia'];
$mail_array=array($mail);
} print_r($mail_array); //$mail = $recordG['Email_goscia']; //echo $mail; */
if (isset($_POST["zaznaczyc".$i]))
{
$sql_wyniki = mysqli_query($sqlc, "INSERT INTO wyniki (Data_wypelnienia, ID_kwestionariusza) VALUES (NULL, $id)");
$id_wyniku=mysqli_query($sqlc, "SELECT ID_wyniku FROM wyniki WHERE ID_kwestionariusza=$id");
$id_wyniku2 = mysqli_fetch_assoc($id_wyniku);
$data_waznosci = $_POST['data_waznosci'.$i];
//$tablicaMail1 = $_SESSION['tablicaMail'][$i]; //print_r($_SESSION); // echo $tablicaMail1;
$tabMail=$mail_array[$i];
$sql_zaproszenie=mysqli_query($sqlc, "INSERT INTO zaproszenia (Email_goscia, ID_kwestionariusza, ID_wyniku, Data_zaproszenia, Data_waznosci, Wynik, Ocena, Status)
VALUES ('$tabMail', $id, '$id_wyniku2[ID_wyniku]', '$data_zaproszenia', '$data_waznosci', NULL, NULL, 'Status')"); //dodawanie kolejnych odpowiedzi do bazy
echo "<script type='text/javascript'>alert('Zaproszenie wysłano!');</script>";
}
else
{
echo "<script type='text/javascript'>alert('Zaproszenia NIE wysłano!');</script>";
}
}
}
mysqli_close($sqlc);
}
}
else
{
echo mysqli_connect_errno();
}
?>

Answer 1

Replace below Line. it was crating new array every time with assignment operator
$mail_array=array($licznik => $mail);
//change this line to
$mail_array[$licznik]=$mail;