PHP Text Analysis is a library for performing Information Retrival (IR) and Natural Language Processing (NLP) tasks using the PHP language. All the documentation for this project can be found in the wiki.

http://yooper.github.io/php-text-analysis/

For Ubuntu

sudo apt-get install libpspell-dev 
sudo apt-get install php5-pspell
sudo apt-get install aspell-en
sudo apt-get install php5-enchant

For Centos

sudo yum install php5-pspell
sudo yum install aspell-en
sudo yum install php5-enchant