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Editorial Team
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Asked: 2026-05-25T19:40:23+00:00

My drupal based website was working fine till yesterday but suddenly from no where

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My drupal based website was working fine till yesterday but suddenly from no where today an error appeared

Fatal error: Undefined class constant 'MYSQL_ATTR_USE_BUFFERED_QUERY' in /.../includes/database/mysql/database.inc on line 43

I didn’t even changed or updated anything since yesterday, it suddenly appears from no where, before that it was working fine

On line 43 of database.inc this was written

 PDO::MYSQL_ATTR_USE_BUFFERED_QUERY => TRUE,

I googled and got some idea that this is some sort of PDO_MYSQL error, i have not much idea why this error suddenly arrived

Can anyone please help me out

Additional information

  • Linux Shared Webhosting
  • DRUPAL 7
  • Apache version 2.2.20
  • PHP version 5.2.17
  • MySQL version 5.0.92-community-log
  • cPanel Version 11.30.3 (build 5)
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1 Answer

  1. Editorial Team

    According to a lot of different sources the pdo_mysql extension must be missing from your PHP installation. Either add it in php.ini or ask your hosting provider to do it for you.

    Links:

    They all say the same thing…install the pdo_mysql extension. Sounds like your hosting provider has disabled it!

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