<?php
    $servername = "localhost";
    $username = "root";
    $password = "";
    $dbname = "project_db";

    // Create connection
    $conn = new mysqli($servername, $username, $password, $dbname);
    // Check connection
    if ($conn->connect_error)
    {
        die("Connection failed: " . $conn->connect_error);
    }

    $sql = "SELECT ingredient_id, ingredient_name FROM ingredients";
    $result = $conn->query($sql);

$array = array(); //used to hold each ingredient as a variable to pass to php script
array_unshift($array,"");
unset($array[0]); //our first ingredient_id is set to 1 so I've started my array at 1 to allow for that
$_SESSION['arr'] = $array;

if ($result->num_rows > 0)
{
    // output data of each row
    while($row = $result->fetch_assoc())
    {
    echo "<br /><button id='$row[ingredient_id]' name='button' value='button' class='btn-info btn-lg' onClick='return addItem($row[ingredient_id])'>$row[ingredient_name]</button><br />";
                array_push($_SESSION['arr'],$row['ingredient_name']);
    }
}
else
{
    echo "0 results";
}

    $conn->close();
?>