title: use html form value inserted into php file for csv export
body: <p>I have the following form I want to be able to set the invoice number that will be the starting point used in my php file that I have made to export orders to csv:</p>
  
  <pre><code>&lt;form action="QB_EXPORT.php" method="post"&gt;
  
      &lt;div class="add-to-cart-quantity"&gt;
  
          &lt;label class="quantity-label" &gt;invoice starting number&lt;/label&gt;&lt;br/&gt;
          &lt;input type="number" min="1" value="25200" name="invoice_number" style="width:225px; height:21px;  text-align:center; border:2px solid rgb(224, 224, 224); padding:10px; "&gt;
  
      &lt;/div&gt;
      &lt;br/&gt;&lt;br/&gt;
  &lt;div id="cartbutt"&gt;
  
  
      &lt;div class="shop-card"&gt;
          &lt;button name="submit" class="btn addToCartButton" style="float:none;"&gt;EXPORT INVOICES&lt;span class="bg"&gt;&lt;/span&gt;&lt;/button&gt;
      &lt;/div&gt;
  
  
  
  &lt;/div&gt;
  
      &lt;/form&gt;
  </code></pre>
  
  <p>I want to use the value from the input number "invoice_number" as the starting value in my php file QB_EXPORT.php</p>
  
  <p>Is there a way to use it in the php file? THe only way I can think of is to create a database entry for the value and then pull it from the database in the QB_EXPORT.php file but I was just curious if there is a way to avoid having to store it in the database which now that I am typing it out I am realizing won't be that hard. </p>