Title: 7.3 PHP error – critical error
Last modified: August 17, 2020

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# 7.3 PHP error – critical error

 *  Resolved [sarahweb](https://wordpress.org/support/users/sarahweb/)
 * (@sarahweb)
 * [5 years, 8 months ago](https://wordpress.org/support/topic/7-3-php-error-critical-error/)
 * Hiya – updated to WP 5.5 and then went to update to PHP 7.3 and critical error–
   in logs I get this:
 * [17-Aug-2020 11:15:51 UTC] PHP Warning: Use of undefined constant JSON_UNESCAPED_SLASHES–
   assumed ‘JSON_UNESCAPED_SLASHES’ (this will throw an Error in a future version
   of PHP) in /…../wp-content/plugins/tablepress/tablepress.php on line 63
    [17-
   Aug-2020 11:15:51 UTC] PHP Warning: A non-numeric value encountered in /…../wp-
   content/plugins/tablepress/tablepress.php on line 63
 * Thank you
    Sarah

Viewing 4 replies - 1 through 4 (of 4 total)

 *  Plugin Author [Tobias Bäthge](https://wordpress.org/support/users/tobiasbg/)
 * (@tobiasbg)
 * [5 years, 8 months ago](https://wordpress.org/support/topic/7-3-php-error-critical-error/#post-13270300)
 * Hi,
 * thanks for your post, and sorry for the trouble.
 * That sounds strange. From what I can see, this `JSON_UNESCAPED_SLASHES` constant
   was introduced in PHP 5.4, see [https://www.php.net/manual/en/json.constants.php](https://www.php.net/manual/en/json.constants.php)
   
   I can therefore only assume that there’s something special about the copy of 
   PHP on your server. Is the JSON module integrated?
 * Also, I haven’t received any reports like that before, even though TablePress
   has been using that constant for a while now. To me, this is also an indicator
   that there’s something weird going on on your server.
 * Regards,
    Tobias
 *  Thread Starter [sarahweb](https://wordpress.org/support/users/sarahweb/)
 * (@sarahweb)
 * [5 years, 8 months ago](https://wordpress.org/support/topic/7-3-php-error-critical-error/#post-13272987)
 * I have checked and JSON is switched on for PHP 7.2… I will ask server hosts and
   see if they can explain it also – and yes I agree its very odd for your plugin
   to throw errors! Was surprised myself
 * I will see what else I can determine
 * Thank you
    Sarah
 *  Thread Starter [sarahweb](https://wordpress.org/support/users/sarahweb/)
 * (@sarahweb)
 * [5 years, 8 months ago](https://wordpress.org/support/topic/7-3-php-error-critical-error/#post-13273008)
 * Found error – and yes when updated to 7.3 JSON got dropped – even though its 
   visible for 7.2 and 7.4!!
 * Sorry about that – all now working correctly again 🙂
 *  Plugin Author [Tobias Bäthge](https://wordpress.org/support/users/tobiasbg/)
 * (@tobiasbg)
 * [5 years, 8 months ago](https://wordpress.org/support/topic/7-3-php-error-critical-error/#post-13273094)
 * Hi,
 * no problem, you are very welcome! 🙂 Good to hear that this helped!
 * Best wishes,
    Tobias
 * P.S.: In case you haven’t, please [rate TablePress](https://wordpress.org/support/plugin/tablepress/reviews/#new-post)
   here in the plugin directory. Thanks!

Viewing 4 replies - 1 through 4 (of 4 total)

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 * 4 replies
 * 2 participants
 * Last reply from: [Tobias Bäthge](https://wordpress.org/support/users/tobiasbg/)
 * Last activity: [5 years, 8 months ago](https://wordpress.org/support/topic/7-3-php-error-critical-error/#post-13273094)
 * Status: resolved