Requirements
on ubuntu you can get it from Synaptic Package Manager
just search words "gmp",you'll find it.
Installation
In order to have these functions available, you must compile PHP with GMP support by using the --with-gmp option.
add a note
User Contributed Notes
Installation
admin at ee-dd dot com
03-Oct-2011 09:18
MiquelFire
24-Aug-2009 12:40
With PHP 5.3 on Windows, you need to use the VC9 build, otherwise you will not have the dll to enable GMP
Chris
02-Mar-2009 11:49
Under Windows you will need to uncomment the line
;extension=php_gmp.dll
within the php.ini and restart Apache.
arancaytar dot ilyaran at gmail dot com
30-Dec-2008 11:48
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.