php5-gmp 5.6.4+dfsg-4ubuntu2 (amd64 binary) in ubuntu vivid

 This package provides a module for arbitrary precision arithmetic via the
 GNU Multiple Precision (GMP) Arithmetic Library.
 .
 PHP (recursive acronym for PHP: Hypertext Preprocessor) is a widely-used
 open source general-purpose scripting language that is especially suited
 for web development and can be embedded into HTML.