on ubuntu you can get it from Synaptic Package Manager
just search words "gmp",you'll find it.
برای استفاده از این توابع PHP را با پشتیبانی از GMP با استفاده از گزینه --with-gmp کامپایل کنید.
add a note User Contributed Notes Installation - [7 notes]
admin at ee-dd dot com ¶
1 year ago
4 years ago
Under Windows you will need to uncomment the line
within the php.ini and restart Apache.
arancaytar dot ilyaran at gmail dot com ¶
4 years ago
Note that this parameter requires a path, as in --with-gmp=DIR, if gmp is installed in a non-standard location, which is almost always the case when you are building your own PHP installation in your home directory.
Obvious, but it's an easy mistake.
3 years ago
With PHP 5.3 on Windows, you need to use the VC9 build, otherwise you will not have the dll to enable GMP
omagaldadze at yahoo dot com ¶
14 days ago
On ArchLinux php 5.4.14-1 I had to uncomment the line
in /etc/php/php.ini file.
Probably, restart of web server (e.g. Apache) is required if working from web.
mike dot mackintosh at angrystatic dot com ¶
1 month ago
On Debian platforms, make sure you install the gmp development library first:
sudo apt-get install libgmp-dev
Just like other extensions, you need the libs installed before php compile will gracefully complete.