Get selected value and display to another page - php

Question

This select will display a list of users with their ID, fname and lname.
How to do, so if I chose on user from the list, and then I click the button "send", it will redirect to another page, and in the second page it will display the user that I selected?
$stid = oci_parse($conn, "select user_id, fname,lname from users");
oci_execute($stid);
echo "<select size = '5'>";
while (($row = oci_fetch_array($stid,OCI_ASSOC+OCI_RETURN_NULLS))!= false) {
echo "<option value=$row[user_id]>".$row['user_id'] . " " .$row['fname']
. " " . $row['lname'] . "</option>";
}
echo "</select>";
<form method="post" action="send.php">
<input type="submit" name="send" value="send">
</form>

Answer 1

You should set the form method to get rather than post. You also need to give the select element a name attribute, so it's value is sent.
<form method="get" action="send.php">
<?php
$stid = oci_parse($conn, "select user_id, fname,lname from users");
oci_execute($stid);
echo "<select name='id' size = '5'>";
while (($row = oci_fetch_array($stid,OCI_ASSOC+OCI_RETURN_NULLS))!= false){
echo "<option value=$row[user_id]>".$row['user_id'] . " " .$row['fname'] . " " . $row['lname'] . "</option>";
}echo "</select>";
?>
<input type="submit" name="send" value="send"></p>
</form>
Submitting your form will send you browser to:
send.php?send=send&id=<id>
Then, in send.php you can get the user id from the $_GET superglobal.
$userId = $_GET['id']