How to install/enable GMP (math functions) for PHP on Ubuntu?

Question

When calling a gmp math function like gmp_mod, I get:

Fatal error: Call to undefined function gmp_mod()

I have installed the php5-gmp package and restarted the web-server, and the function is still undefined. The server is running Ubuntu 10.04 and PHP is running as an Apache module. All software was installed from official packages.

How do I enable the GMP math functions in PHP? I'm looking for a solution that uses official packages, not compiling from source.

score 26 · Answer 1 · answered Jan 09 '13 at 10:04

26

Here is the way which worked for me :

Installed GMP with apt-get install php5-gmp
Added extension=php_gmp.so to php.ini

Et voilà !

phpinfo() sample :

gmp
gmp support     enabled
GMP version     4.3.2

It works fine here (Debian), so I suppose it will be ok for Ubuntu too.

answered Jan 09 '13 at 10:04

Benj

399
3
8

2

On Ubuntu 12.04 LTS, I needed to use `gmp.so`, not `php_gmp.so`. I also needed to restart Apache for the changes to take effect (not surprising as I'm using `mod_php`). – Calrion Jan 26 '14 at 23:52
1

In my case `sudo apt-get install php5-gmp` automatically updated php.ini and restarted Apache. – KalenGi Dec 03 '14 at 23:52
5

For php 7 : apt-get install php7.0-gmp – George D. Aug 03 '16 at 12:19
@Benj Can u please tell me, how to install gmp library for php on mac OS? – mohan.gade Apr 19 '17 at 04:31
2

For the record, for PHP7.1 : apt-get install php7.1-gmp – John Shipp Nov 09 '17 at 21:39

How to install/enable GMP (math functions) for PHP on Ubuntu?

1 Answers1