How to randomly select two strings? - php

Question

I have decided to store the winner into another database table and then to use that to output the winner on another page... I have the following code but for some reason, my second query is not working and I have checked it through... All the variables are correct and my database table should be set up correctly:
<?php
include_once __DIR__.'/header2.php';
if(!isset($_SESSION['u_uid'])) {
echo "<meta http-equiv='refresh' content='0;url=index.php?level1promo_competitions_winner=notlogin'>";
exit();
} else {
if($_SESSION['u_permission'] == 0) {
echo "<meta http-equiv='refresh' content='0;url=header2.php?level1promo_competitions_winner=nopermission'>";
exit();
} else {
include_once __DIR__.'/includes/dbh.php';
$level1promo_competitions_winner_form = strip_tags($_POST['level1promo_competitions_winner_form']);
if ($level1promo_competitions_winner_form == $level1promo_competitions_winner_form) {
$limit = 1;
$sql = "SELECT * FROM level1promo_participants WHERE entry_id = ? ORDER BY RAND() LIMIT ?;";
$stmt = mysqli_stmt_init($conn);
if(!mysqli_stmt_prepare($stmt, $sql)) {
echo "SQL error";
} else {
mysqli_stmt_bind_param($stmt, "si", $level1promo_competitions_winner_form, $limit);
mysqli_stmt_execute($stmt);
$result = mysqli_stmt_get_result($stmt);
$resultCheck = mysqli_num_rows($result);
if($resultCheck < 1) {
echo '<div class="nolevel1promo_competitions_winner">There are no Level 1 Promo Competition\'s Winner yet for that entry id</div>';
exit();
} else {
$row = mysqli_fetch_assoc($result);
$useruid = $row['user_uid'];
$email = $row['user_email'];
echo $level1promo_competitions_winner_form;
echo $useruid;
echo $email;
$sql2 = "INSERT INTO level1promo_winner (entry_id, user_uid, user_email) VALUES (?,?,?);";
$stmt = mysqli_stmt_init($conn);
if (!mysqli_stmt_prepare($stmt, $sql2)) {
echo "SQL statement failed";
} else {
//Bind parameters to the placeholder
mysqli_stmt_bind_param($stmt, "sss", $levelpromo_competitions_winner_form, $useruid, $email);
mysqli_stmt_execute($stmt);
echo "<meta http-equiv='refresh' content='0;url=header2.php?level1promo_competitions_winner=success'>";
}
}
}
}
}
}
?>

Answer 1

You can do it easily by using below query. you don't need to put that much logic for it.
select column_name from table_name order by RAND() limit 1