I have created a WordPress Plugin which after activating shows result in jquery Datatable. We are fetching the result via CURL Post. The Post URL is a ASP.Net Application on Windows Server.

The plugin is created for my client who is experiencing below error after adding my shortcode in a Post.

Client is using Elegant Themes' Divi (latest version), WordPress 5.2.2 running on Apache / PHP 7.2.21

This error is showing only on that Post page where the shortcode is added:

Warning: mysqli_query(): MySQL server has gone away in /homepages/10/d241347454/htdocs/wp-includes/wp-db.php on line 2007**

Warning: mysqli_query(): Error reading result set's header in /homepages/10/d241347454/htdocs/wp-includes/wp-db.php on line 2007**

Here is my Plugin Code:

 $atts = shortcode_atts(
                'secretkey' => ''
        $thisoptions = get_option( 'MySecretKeySettings' );
         $url = 'https://sub.someASPnetWebsite.com/api/TestimonialList';  
        $webApiUn = $thisoptions['webApiUn'];
        $webApiPwd = $thisoptions['webApiPwd'];
        $webApisecretkey = $atts['secretkey'];
        $data = array('webApiUn' => $webApiUn, 'webApiPwd' => $webApiPwd, 'SecretKey' => $webApisecretkey);
    $data_string = json_encode($data);
    $ch = curl_init($url);
    //curl_setopt($ch, CURLOPT_CUSTOMREQUEST, "POST");
    curl_setopt($ch, CURLOPT_POST, 1);
    curl_setopt($ch, CURLOPT_POSTFIELDS, $data_string);
    curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
    curl_setopt($ch, CURLOPT_HTTPHEADER, array(
        'Content-Type: application/json',
        'Content-Length: ' . strlen($data_string))
    curl_setopt($ch, CURLOPT_TIMEOUT,75);
    curl_setopt($ch, CURLOPT_CONNECTTIMEOUT, 15);
    //execute post
    $result = curl_exec($ch);
    $endresult = json_decode($result);

foreach ($endresult->reviews->review as $key=>$value) {?>
<td><?php echo time_elapsed_string($endresult->reviews->review[$key]->datePublished); ?></td>
<td> <?php echo $endresult->reviews->review[$key]->rating; ?></td>

<td>More Data....</td>
<?php } ?>

I am not able to replicate the error which my client is reporting. On my end everything is working like a charm.

Please guide my on how can this be fixed.


Kindly refer to this ticket. https://wordpress.org/support/topic/warning-mysqli_query-mysql-server-has-gone-away/#topic-9911138-replies

Its related to mysql memory exhausted, due to large db size or might be low packet size memory.

  • So this is something fixed from clients end?
    – vanurag
    Sep 12 '19 at 8:10
  • Yes its hosting related issue, ask your client to contact to his hosting provider to resolve this issue. Sep 12 '19 at 8:10
  • I saw the link you given before posting my question but still I am not very much sure if this is something fixed by clients end. I need to be very much sure and confident before sending him.
    – vanurag
    Sep 12 '19 at 8:15
  • Visit this official Mysql documentation. dev.mysql.com/doc/refman/8.0/en/…. Its narrated that By default, the server closes the connection after eight hours if nothing has happened. You can change the time limit by setting the wait_timeout variable when you start mysqld Sep 12 '19 at 8:16
  • But I am not using any MySql query to show or fetch data in Jquery DataTable then why getting the Warning?
    – vanurag
    Sep 12 '19 at 8:44

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