Create and transfert array php - php

Question

I'm searching a way to create arrays from a form and transfer it to another page:
This is my actual code :
<?php
$nba = $_GET["nbadultes"]; // recup number of passangers
$adu = array();
for ($i=1;$i<=$nba;$i++)
{
echo '<h3>Passager '.$i.'</h3>
<label>CIVILITÉ</label>
<select class="full-width" name="Civilite">
<option value="Mr" selected >Mr.</option>
<option value="Mrs" >Mrs.</option>
</select>
<label>FIRSTNAME *</label>
<input type="text" name="FIRSTNAME"/>
<label>LASTNAME *</label>
<input type="text" name="LASTNAME"/> ';
$adu[$i][civilite] = $_POST['civilite'];
$adu[$i][FIRSTNAME] = $_POST['FIRSTNAME'];
$adu[$i][LASTNAME] = $_POST['LASTNAME'];
}
$_SESSION['liste_adultes'] =$adu;
?>
And this code in the next page to read the array :
<?php
if (isset($_SESSION['liste_adultes']))
print_r ($liste_adultes);
?>
But I don't know why the array is empty :
Array
(
[1] => Array
(
[Civilite] =>
[FIRSTNAME ] =>
[LASTNAME] =>
)
[2] => Array
(
[Civilite] =>
[FIRSTNAME ] =>
[LASTNAME] =>
)
)

Answer 1

You need to take care of the form inputs you send
As I can see, right now the form is not submitted, so you don't need a session but a form which have set the action to a page that handles the sent data. Something like:
<form method="post" action="my-action-file.php">
<?php
$nba = $_GET["nbadultes"];
for ($i = 1; $i <= $nba; $i++) {
echo '<h3>Passager '.$i.'</h3>
<label>CIVILITÉ</label>
<select class="full-width" name="Civilite[]">
<option value="Mr" selected >Mr.</option>
<option value="Mrs" >Mrs.</option>
</select>
<label>FIRSTNAME *</label>
<input type="text" name="FIRSTNAME[]"/>
<label>LASTNAME *</label>
<input type="text" name="LASTNAME[]"/> ';
}
?>
<input type="submit" value="Submit" />
</form>
In the my-action-file.php file you can get the $_POST variables as:
<?php
foreach ($_POST['Civilite'] as $key => $civilite) {
$firstName = $_POST['FIRSTNAME'][$key];
$lastName = $_POST['LASTNAME'][$key];
// now you have the sent data.. just use it like you need..
}
// of course you can add these data to an array if you like so

Answer 2

In the second page you need to read the session data, then read the specific value you saved in the session into the variable you used:
<?php
if(!isset($_SESSION)){ session_start();}
if(isset($_SESSION['liste_adultes'])){
$liste_adultes = $_SESSION['liste_adultes'];
print_r($liste_adultes);
}
?>
Also, in the first page, make sure you post data and read it with $_POST; or via query string with $_GET