<?php
include('includes/config/config.php');
include('includes/functions.php');
include('log_entry.php');

$habit_id = $_POST['habit_id'];
$habit = $_POST['habit'];

if (!empty($habit_id)) {
    $in = "update";
    $en = " where habit_id = '" . $habit_id . "'";
} else {
    $in = "insert into ";
    $em = '';
}

$query = $in . " habits set habit = '$habit',modified_by='" . $_SESSION['user_id'] . "'" . $en;
error_log($query);
if (!$result = @mysqli_query($conn, $query)) {
    exit(mysqli_error($conn));
}