Error when loading a php module - php

Question

I added the curl module in /etc/php/7.0/cli/php.ini :
extension = /usr/lib/php5/20121212/curl.so
but when I restart php and I do :
php -m
I get this error :
curl : Unable to initialize module
Module compiled with module API=20121212
PHP compiled with module API=20141010
These options need to match
I also tried :
apt-get install php5-curl
Curl is "already to the new version".
And phpinfo() tells php5 is running :
PHP Version 5.5.9
php.ini Path : /etc/php5/fpm
PHP Extension : 20121212
but when I check on the server with :
which php => /usr/bin/php (for php7)
php -v => PHP 7.0 (with a warning before "Unable to initialize module")
and if I remove curl.so in the php.ini above (the one of php7, at 1st line) the warning disapear.
---------------------------------------
so I added : extension=/usr/lib/php5/20121212/curl.so
in :
/etc/php5/fpm/php.ini
then I restart, but I still can't see this module :
And here the error saying this module is still missing :

Answer 1

So, if you're trying to add the module to webserver's PHP, which is in your case PHP5, you need to add that module to /etc/php5/fpm/php.ini (based on your previous question where you stated that you use NGINX+PHP-FPM).
If you want to add it to the CLI version - you're doing it wrong, cause you're adding PHP5 module to PHP7 - that won't work, you need to install php7-curl and it will auto-add itself where needed.
To elaborate somewhat more. Your phpinfo() tells you that your INI path is in /etc/php5/fpm:
PHP Version 5.5.9
php.ini Path : /etc/php5/fpm
PHP Extension : 20121212
Hence, to add any extensions to that particular PHP - just add them to /etc/php5/fpm/php.ini. Note, you can not (or very rarely) add extensions from one version of PHP to another version of PHP.
I'll add a summary of what's happening on the OP's system for future reference then.
Basically, OP has 2 versions of PHP installed on the system simultaneously, PHP5 and PHP7 with an NGINX werserver with php-fpm extension.
His NGINX is configured to use PHP5, while CLI PHP defaults to PHP7.
The confusion with OP comes from the fact that on an Ubuntu system there's a clear difference between the PHP that's called from the CLI and the PHP that's used by webserver.
CLI tools are available per-version as /usr/bin/php5 and /usr/bin/php7, with one default link /usr/bin/php pointing to one particular version, in this case PHP7.
For the FPM module, there are 2 packages available php5-fpm and php7-fpm, with respective configs in /etc/php5/fpm/php.ini and /etc/php/7.0/php.ini.
For the CLI, there are 2 packages available as well - php5-cli and php7-cli, with respective configs in /etc/php5/cli/php.ini and /etc/php/7.0/cli/php.ini.
For curl extension, there's the same story, php5-curl and php7-curl. Extensions will be auto-wired to the needed INI files by the deb installer.
Installing multiple versions of PHP for fun can create this kind of confusion. :)

Answer 2

That means that your CURL module was compiled against a different version of PHP. Depending on your flavor of Linux (looks like Debian flavor) you might need to install a module
sudo apt-get install php5-curl

Answer 3

What about calling your hosting company to see what versions they have available and which one's your code are picking up?
Maybe they have some unique setup that's picking versions in a way you aren't picturing (one wouldn't picture.)