I have a large HTML form where I currently insert filled html fields into and array. When I print out my `$_POST['rep_list'];` it gives me the keys and values filled out from the form. But what I need is an array with **all** form fields (***even the ones not filled out***).  

Any suggestion/examples on how to achieve this?

```
    <form action="insert-data.php" name="workCard" method="POST">
    <fieldset>
    <legend><h3>Repair</h3></legend>
    <table>
      <tr>
        <th>Description</th>
        <th>Front</th>
        <th>Back</th>       
      </tr>
      <tr>
        <td>tire</td>
        <td><input type="checkbox" name="rep_list[tire_front]" value="tire_front" /></td>
        <td><input type="checkbox" name="rep_list[tire_back]" value="tire_back" /></td>
        <td>alm <input type="checkbox" name="rep_list[tire_reg]" value="tire_reg" /></td>
        <td>indl <input type="checkbox" name="rep_list[tire_indl]" value="tire_indl" /></td>
      </tr>
      <tr>
        <td>Tube</td>
        <td><input type="checkbox" name="rep_list[tube_front]" value="tube_front" /></td>
        <td><input type="checkbox" name="rep_list[tube_back]" value="tube_back" /></td>
      </tr>
      <tr>
        <td>Hub.rep.</td>
        <td><input type="checkbox" name="rep_list[hub_front]" value="hub_front" /></td>
        <td><input type="checkbox" name="rep_list[hub_back]" value="hub_back" /></td>
        <td>just. <input type="checkbox" name="rep_list[hub_adjust]" value="hub_adjust" /></td>
 etc…....

```