1. We need to have php5, gcc, gcc-c++, autoconf, automake and apache server installed.

2. Need to install php-pecl* and php-pear.

3. #> yum install php-pecl*     <enter>

4. #> yum install php-devel     <enter>

5. #> yum install php-pear      <enter>

6. #> pecl install Xdebug        <enter>

7. Need to configure your PHP to load the extension.
[Xdebug]
xdebug.profiler_enabl = 1
xdebug.profiler_output_dir = /tmp


8. apache server restart.