PHP Startup: Unable to load dynamic library 'php_mysqli' in codeigniter ubuntu

Question

I have installed php7.2, apache and mysql. When I copied codeigniter folder in my var/www/html it runs but give one error as

A PHP Error was encountered

Severity: Core Warning

Message: PHP Startup: Unable to load dynamic library 'php_mysqli' (tried: /usr/lib/php/20170718/php_mysqli (/usr/lib/php/20170718/php_mysqli: cannot open shared object file: No such file or directory), /usr/lib/php/20170718/php_mysqli.so (/usr/lib/php/20170718/php_mysqli.so: cannot open shared object file: No such file or directory))

Filename: Unknown

Line Number: 0

Backtrace:

I search for the same and tried with different solution as updating php.ini file but still getting the same error.

I am using Ubuntu 18.04.1 LTS OS

Your help would be appreciated. Thanks.

This is a PHP issue and not CodeIgniter. See this SO question — DFriend
– DFriend, Commented Nov 21, 2018 at 19:32
Make sure that you installed lamp stack correctly and added all required dependencies. — Sherif Salah
– Sherif Salah, Commented Nov 21, 2018 at 22:13
have you installed php7.2-mysql? and restarted server after installation? — user969068
– user969068, Commented Nov 22, 2018 at 15:37

Amarjit Singh · Accepted Answer · 2018-11-22 09:20:19Z

2

Install php extension for mysql.

use this command

sudo apt-get install php-mysql

After installation restart apache with this command

sudo service apache2 restart

update

If sudo apt-get install php-mysql

not work for you then you should use

sudo apt-get install php7.2-mysql

answered Nov 22, 2018 at 9:20

Amarjit Singh

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3 Comments

Nagesh Katke Over a year ago

php-mysql is installed and it is working fine with core php but not with codeigniter.

Kosmos Over a year ago

Tried both ways but anyone didn't help me.

Amarjit Singh Over a year ago

@Kosmos First check the php version used by the web server it could be different than the version returned by php --version cmd. After knowing the php version try installing the php-mysql package for that php version using the cmd as sudo apt-get install php<version>-mysql. Don't forget to replace <version> with the one used by the web server.

Pati · Accepted Answer · 2018-11-22 06:39:57Z

0

You should open php.ini file and check if the line:

 extension=mysqli.so

presented and not commented with # sign

answered Nov 22, 2018 at 6:39

Pati

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1 Comment

Chris Over a year ago

php.ini lines are commented with ;

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