Php – Display previously selected value in drop down when editing

hi I’m beginner in php coding i have a problem to display the previously selected value in drop down list when im editing its blank regardless of its selected value as I have two tables table admin_profile which i keep record of users and table of current_jobs I’m fetching the username of the users to be displayed in a drop down list to be stored in table column checker

here is my code

            </select>   
        </div>
    </div> 
            
    <div class="col">
        <div class="form-group">
<?php 
    $query ="SELECT user_name FROM admin_profile 
            where  user_role='Checker' or user_role='Designer' ";
    $result = $conn->query($query);
    if($result->num_rows> 0){
        $options = mysqli_fetch_all($result, MYSQLI_ASSOC);
    }
?>
            <label>Checker</label>
            <select class="form-control" name="checker" id="checker" >
                <option value=""  ></option>
<?php 
    foreach ($options as $option) {
?>
                <option value=""><?php echo $option ['user_name']; ?> </option>
<?php 
    }
?>
            </select>

I tried this code but its not working

<option  <?php if (!empty($checker) && $checker == $option['user_name']) echo "selected"; ?>>   </option>