What are some troubleshooting steps to take when only the first or last value from a MySQL table is displayed in a dropdown menu in PHP?

When only the first or last value from a MySQL table is displayed in a dropdown menu in PHP, it is likely that there is an issue with the loop that fetches and populates the dropdown options. To solve this issue, make sure to iterate through all the rows fetched from the database and add each value to the dropdown menu options.

<select name="dropdown">
<?php
// Assuming $result contains the fetched data from the MySQL table
while($row = mysqli_fetch_assoc($result)) {
    echo "<option value='" . $row['column_name'] . "'>" . $row['column_name'] . "</option>";
}
?>
</select>