一个脚本上的“MySQL PHP扩展不可用”错误，而其他一切工作正常

Question

On Ubuntu 16.04 AWS instance, a WordPress website is working just fine. When I tried to install another IMS (institute management system), it failed to install and the self-installer showed the following error:

Required - MySQL PHP extension available (Not Available)

My php version: 7.0.33-0ubuntu0.16.04.5

My MySQL version: 14.14 Distrib 5.7.27, for Linux (x86_64) using EditLine wrapper

I have tried changing the php.ini file. Uncommented the line

extension=mysql.so

Although when I went to the location, i.e, /usr/lib/php/20151012, there was no file named mysql.so.

There was a file named mysqli.so, so I then changed the line to

extension=mysqli.so

and then restarted the apache2 service but to no avail. There is still the same error:

Required - MySQL PHP extension available (Not Available)

Answer 1

The MySQL extension is no longer available in PHP 7.0+. If you have older code, you'll need to update or upgrade.

This is especially important for older WordPress installs that will be compromised by automatic attack tools if you're not vigilant about staying patched.