Untitled

<?php
$url = "127.0.0.1";
$user = "username";
$pass = "password";
$conn = mysqli_connect("$url","$user","$pass","space");
?>

<html>
    <head>
        <?
        include 'db.php';
        ?>
        <!-- Header stuff -->
    </head>
    <body>
        <!-- Body stuff -->
        <?php
            $spaceSelect = mysqli_query($conn, "SELECT * FROM `world`");
            $i = 1;
            while($space = mysqli_fetch_array($spaceSelect)){
                echo "<button id='sector' data-toggle='modal' data-target='#".$space['id']."Modal'>".$space['id']."</button>";
                $i += 1;
                if($i % 10 == 1){
                    echo "<br>";
                };
                echo "stuff";
            };
        ?>
    </body>
</html>

Notice: Undefined variable: conn in S:sharedspaceindex.php on line 30

<html>
    <head>
        <?

        ?>
        <!-- Header stuff -->
    </head>
    <body>
        <!-- Body stuff -->
        <?php
            include 'db.php';
            $spaceSelect = mysqli_query($conn, "SELECT * FROM `world`");
            $i = 1;
            while($space = mysqli_fetch_array($spaceSelect)){
                echo "<button id='sector' data-toggle='modal' data-target='#".$space['id']."Modal'>".$space['id']."</button>";
                $i += 1;
                if($i % 10 == 1){
                    echo "<br>";
                };
                echo "stuff";
            };
        ?>
    </body>
</html>