PDO extension not loading in PHP

Question

So i'm trying to use the PDO module in PHP on a Redhat based distribution (RHEL7) to interact with a database.

In my Php script i have the 'use PDO;' directive, but in the PHP log i get an error : PHP Fatal error: Uncaught Error: Class 'PDO' not found in ...

The extension is uncommented in the php.ini file (extension = pdo.so), i have tried with the relative and the absolute path. I even reinstalled the php-pdo package (yum install), but without success.

I've compared my phpinfo() with a working phpinfo(), and i am missing the PDO section.

I have checked and Apache loads the correct php.ini file

I've passed all my extensions permissions to 755 just to be sure.

I don't get any php warning at startup so i don't know where the problem seems to be.

did you restart the apache/php-fpm server after installing it? — treyBake
– treyBake, Commented Apr 15, 2019 at 14:52
Yes, each time i change anything in my php.ini file i restart my apache server — Sim Hm
– Sim Hm, Commented Apr 15, 2019 at 14:53
When I run phpinfo, I see these options for pdo in the configure command section: '--with-pdo-dblib=/usr/local/opt/freetds' '--with-pdo-mysql=mysqlnd' '--with-pdo-odbc=unixODBC,/usr/local/opt/unixodbc' '--with-pdo-pgsql=/usr/local/opt/libpq' '--with-pdo-sqlite=/usr/local/opt/sqlite' If you don't see something similar to this, try installing the php-mysql package. — wclark
– wclark, Commented Apr 15, 2019 at 15:08
'--enable-pdo=shared' '--with-pgsql=shared,/usr/pgsql-9.6' '--with-pdo-pgsql=shared,/usr/pgsql-9.6' '--enable-mysqlnd=shared' '--with-mysqli=shared,mysqlnd' '--with-pdo-mysql=shared,mysqlnd' '--with-oci8=shared,/logiciels/php/7.1.4/lib/oic' '--with-pdo-oci=shared,/logiciels/php/7.1.4/lib/oic' '--with-sqlite3=shared' '--with-pdo-sqlite=shared,/usr' — Sim Hm
– Sim Hm, Commented Apr 15, 2019 at 15:16

Sim Hm · Accepted Answer · 2019-04-16 08:51:10Z

2

I found the error : First i started using php in direct command line, and set the env' variable LD_DEBUG=libs:

./php -c /path/to/php.ini /path/to/php/file.php

So with that i was able to get the debug on the dynamic loading of my modules and on the php.ini.

I saw that there was an uncommented line that was blocking the loading of the modules in the INI file, then you have to load the mysql.so module before the pdo_mysql.so and of course restart you apache server.

answered Apr 16, 2019 at 8:51

Sim Hm

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