I am working on Amazon EC2 using the Amazon Linux AMI which is based on CentOS. I have installed php54 and php54-mysqlnd. I then do a "sudo pecl install myslqnd_ms" This installs fine. I add the extension into the php.ini file. Then I start httpd, and when I do in the error log I see: PHP Warning: PHP Startup: Unable to load dynamic library '/usr/lib64/php/modules/mysqlnd_ms.so' - /usr/lib64/php/modules/mysqlnd_ms.so: undefined symbol: mysqlnd_globals in Unknown on line 0 Googling this lead me to: https://bugs.php.net/bug.php?id=62276&edit=1 and http://forums.famillecollet.com/viewtopic.php?id=242 neither of which helped me much. I am trying to stick to stock pre built binaries from the main YUM repo if possible. What would be the best solution here? Thanks in advance