Solution:1
Install your mysql library for php, run:
sudo apt-get install php5-mysql
And restart apache:
sudo service apache2 restart
Retry WordPress installation!
Solution:2
First, make sure MySQL server is running. Type the following command at a shell prompt:
/etc/init.d/mysql status
If MySQL is not running, enter:
/etc/init.d/mysql start
If MySQL is not installed, type the following command to install MySQL server:
apt-get install mysql-server
Make sure MySQL module for php5 is installed:
dpkg --list | grep php5-mysql
To install php5-mysql module enter:
apt-get install php5-mysql
Next, restart the Apache2 web server:
/etc/init.d/apache2 restart
Now PHP support for MySQL should work without a problem. Also make sure you set localhost or 127.0.0.1 (recommended) as MySQL hostname while performing wordpress installation.
Solution:3
This is because your apache did not load with mysql module. This will resolve the issue :
yum install php-mysql -y
once the installation is complete. Do a service restart
service httpd restartSolution:4
What helped me is running:
$ php -v
Which showed feedback like:
PHP Warning: PHP Startup: Unable to load dynamic library './msql.so' - ./msql.so: cannot open shared object file: No such file or directory in Unknown on line 0
Indicating that the .so files either don’t exist or the specified containing directory is wrong (ie not ‘./’). After running:
$ find /usr/lib -name "*.so" | grep mysql
I was able to find the .so files in a php directory, /usr/lib/php5/20131226/ :
$ ls
gd.so json.so mysqli.so mysql.so opcache.so pdo_mysql.so pdo.so readline.so ssh2.so
My fix was to change my php.ini file (/etc/php5/apache2/php.ini) to:
extension=mysql.so
...
extension_dir = "/usr/lib/php5/20131226"