Passing an array from one page to another in PHP - php

Question

I have a register form (for events) in which the number of fields input are not same. It depends upon the events. Different events limit different numbers of members for registration. So, in my events TABLE I've a row members which store the number of members.
So,finally my registration form goes like this:
if ($row['members']>1){
echo "Hello ".$sess_name.", you can add ".($row['members']-1)." more members to register for ".$row['name']."<br>";
echo "On successful registration of the event, all the team members will receive an email on their registered email ids<br>";
$mem=array();?>
<form action="" method="post">
<?php for ($i=1;$i<$row['members'];$i++){
echo '<label>Insert ID of Member '.$i.' :</label>';
echo '<input type="text" id="id" size="20" name="'.$mem[].'"><br>';
}
echo '<button type="submit" id="submit" value="Register" name="register1">Register</button>';?>
</form>
I'm storing the ID that are being input in an array($mem)
But I don't know how to pass it ($mem) in another page to store it in MySQL table.

Answer 1

Add an hidden input field
<form action="" method="post">
<?php for ($i=1;$i<$row['members'];$i++){
echo '<label>ID of Member '.$i.' :</label>';
echo '<input type="text" id="email" size="20" name="'.$mem[].'"><br>';
echo '<input type="hidden" id="userID" name="userID[]" value='.$i.'>';
}
echo '<button type="submit" id="submit" value="Register" name="register1">Register</button>';?>
</form>