PHP Prepared Statement I Am Curious To Know Why This Doesnt Work

Question

First and foremost I have to say I am loving PHP. This is too much fun. So here is my question, I am working with prepared statements and the following works

<?php
$qm = $con->prepare("SELECT id, receiving_user_id, send_date, message_title, message_body, senders_name FROM Messages WHERE receiving_user_id=? ORDER by id");
/* execute statement */
$qm ->bind_param('i',$userid);
$qm->execute();
/* bind result variables */
$qm->bind_result($messid, $uid, $sent, $title, $body, $dudesname);
/* fetch values */
while ($qm->fetch()) {
    echo ($dudesname. $title." ");
}
/* close statement */
$qm->close();
/* close connection */
$sql_e = $con-> prepare("SELECT id FROM Messages WHERE receiving_user_id=?");
$sql_e -> bind_param('i', $userid);
$sql_e -> execute();
$userCheck = $sql_e -> get_result();
$sql_e -> close();
if ($userCheck -> num_rows == 0) {
    echo "No Messages... :(";
}
?>

However, since the $sql_e statement and the $qm statement do the exact same thing I was thinking that I could put the following and it would work. But it does not.

$qm = $con->prepare("SELECT id, receiving_user_id, send_date, message_title, message_body, senders_name FROM Messages WHERE receiving_user_id=? ORDER by id");
    /* execute statement */
    $qm ->bind_param('i',$userid);
    $qm->execute();
    /* bind result variables */
    $qm->bind_result($messid, $uid, $sent, $title, $body, $dudesname);
    /* fetch values */
    while ($qm->fetch()) {
        echo ($dudesname. $title." ");
    }
    /* close statement */
    $qm->close();
    /* close connection */

    $qm -> execute();
    $userCheck = $qm-> get_result();
    $qm -> close();
    if ($userCheck -> num_rows == 0) {
        echo "No Messages... :(";
    }

Arent Prepared statements made to type in the same thing such as

$qm -> execute();
// Different Variables Here
$qm -> close();

$qm -> execute();
// Yet Another Set of Variables Here
$qm -> close();

Its weird. Any input on this would be greatly appreciated. I am new to PHP development and am trying to learn everything that I can.

EDIT TO CODE TO GET IT WORKING WITH $stmt reset();

$qm = $con->prepare("SELECT id, receiving_user_id, send_date, message_title, message_body, senders_name FROM Messages WHERE receiving_user_id=? ORDER by id");
/* execute statement */
$qm ->bind_param('i',$userid);
$qm->execute();
/* bind result variables */
$qm->bind_result($messid, $uid, $sent, $title, $body, $dudesname);
/* fetch values */
while ($qm->fetch()) {
    echo ($dudesname. $title." ");
}
/* reset statement */
$qm->reset();

$qm -> execute();
$userCheck = $qm -> get_result();
if ($userCheck -> num_rows == 0) {
    echo "No Messages... :(";
}

/* close statement */
$qm -> close();

Answer 1

You shouldn't need to execute the query twice. I think this is what you want:

$qm = $con->prepare("SELECT id, receiving_user_id, send_date, message_title, message_body, senders_name FROM Messages WHERE receiving_user_id=? ORDER by id");
/* execute statement */
$qm ->bind_param('i',$userid);
$qm->execute();
/* bind result variables */
$qm->bind_result($messid, $uid, $sent, $title, $body, $dudesname);
/* fetch values */
$userCheck = $qm->get_result();
if ($userCheck->num_rows > 0) {
     while ($userCheck->fetch()) {
         echo $dudesname. $title . " ";
     }
} else {
     echo "No Messages... :(";
}
/* close statement */
$qm -> close();

Your current code was closing the connection to early.