title: Send image to php file using ajax without using FormData()
body: <p>This is my html code for the image field:</p>
  
  <pre><code>&lt;div class="row input_detail"&gt;
      &lt;div class="col-lg-4 col-md-4 "&gt;
          &lt;label&gt;Upload Image:&lt;/label&gt;
      &lt;/div&gt;
      &lt;div class="col-lg-8 col-md-8"&gt;
          &lt;input type="file" id="picture" name="pro_picture"/&gt;
      &lt;/div&gt;
  &lt;/div&gt;
  </code></pre>
  
  <p>And, I am using jQuery.post() for ajax request.
  I am designing a WP plugin in which I want to upload image for the registering user. </p>