PHP Startup Unable to load dynamic library /usr/lib/php/20151012/php_mysqli.dll

Question

I have ubuntu 14.04 EC2 instance. I have installed php 7 on it. when I execute any php command like php --version or any other. I get following error

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Answer 1

If you are on Linux, you shouldn't have DLL files but SO files. So first, you have to remove / disable the php_mysqli.dll you added in php.ini.

In order to use mysqli, you should then :

• install the package for Ubuntu : apt-get install php-mysql
• check if it is already enabled (with phpinfo() for example)
• if not enabled, enable the module - check in /etc/php/mods-available/ folder if there is a mysqli.ini, containing extension=mysqli.so, then check for CLI / FPM / Apache / other if there is the symbolic link pointing to this file (for example for CLI, in /etc/php/cli/conf.d/ : 20-mysqli.ini -> ../../mods-available/mysqli.ini)
• restart php / apache / nginx depending what you are using