If you are dealing with CAPTCHA or some graphics stuff you have definitely come across with Imagick.. it is a nice library that you should check out..
to install.. it is much really easy with pecl
here is the step by step process to install it..
pecl download imagick tar -zxvf imagick-VERSION.NUMBER.GOES.HERE.tgz cd imagick-VERSION.NUMBER.GOES.HERE phpize ./configure --with-imagick=/opt/local make make install
Then, on successful make, you will see the path where the “dot so” is saved..
go to you php.ini file and add
then restart you apache and check if the imagic is available on phpinfo()..