title: Warning: a form on this page has more than 1000 fields PHP MySql
body: <p>I've got a questionnaire that went live over the weekend.  After reaching so many entries PhpMyAdmin started showing this warning:</p>
  
  <blockquote>
    <p>Warning: a form on this page has more than 1000 fields.  On
    submission, some of the fields might be ignored, due to PHP's
    max_input_vars configuration.</p>
  </blockquote>
  
  <p>The table is called <code>survey</code> and it has 10 columns and 300 rows of data - mostly <code>strings</code>.  I don't get where its getting the number <code>1000</code> fields from?  Everything was fine until the <code>survey</code> table got to about 150 entries.  I'm worried I will lose my data.</p>
  
  <p>My questionnaire comprises of 20 pages all with multiple choice questions.  All values are stored in the <code>$_SESSION</code> array then sent to the DB on the 21st page.</p>
  
  <p><img src="https://i.stack.imgur.com/hzpl3.png" alt="PhpMyAdmin"></p>