title: Wordpress ajax 500 error after php update
body: <p>I have upgraded my php version from 5.6 to 7.3 , after fixing the deprecated functions and test running the website i am stuck with an issue . I have a plugin from where i am getting a parking fee calculated and returned on the home page , i am sending the data through ajax and updating the form . For some reason the php 5.6 version was not showing me any error but when i update it to 7.3 , the ajax call always shows a http 500 error and i cant access the page where the script is written . This is the page that i am trying to send the data to using ajax :- <a href="https://textifly.co/thecarportandspa.com.au/wp-content/themes/car-port-spa/show_calculation.php" rel="nofollow noreferrer">https://textifly.co/thecarportandspa.com.au/wp-content/themes/car-port-spa/show_calculation.php</a>
  This only happens when i update the php version . Can anyone help me with this issue ?
  The link to my website where the calculation is taking place: <a href="https://textifly.co/thecarportandspa.com.au/" rel="nofollow noreferrer">https://textifly.co/thecarportandspa.com.au/</a></p>