php5-dev software package provides Files for PHP5 module development, you can install in your Ubuntu 14.04 LTS (Trusty Tahr) by running the commands given below on the terminal,
$ sudo apt-get update $ sudo apt-get install php5-dev
php5-dev is installed in your system.
Make ensure the php5-dev package were installed using the commands given below,
$ sudo dpkg-query -l | grep php5-dev *
You will get with php5-dev package name, version, architecture and description in a table
| Distro | Ubuntu 14 04 lts trusty tahr |
| Section | PHP |
| Package | php5-dev |
| Version | 5.5.9+dfsg-1ubuntu4.20 [amd64, |
| Description | Files for PHP5 module development |
| Sub Section | PHP |