For abc.idealwebtools.com/test.php
i want it should open /commonblogs/abc[subdomainname]/test.php

The above htaccess will not work as it was not getting it from /commonblogs/abc[subdomainname]/ .. for this you will have do add some more lines.
RewriteRule (.*) /commonblogs/%1/$1 [L]

I think this should work, in case if it is not working let me know I will write the code for you :). Good day

I want to know if i use abc.idealwebtools.com/test.php then above .htacess code is enought or do i have to add some extra condition to handle this request.

For abc.idealwebtools.com/test.php
i want it should open /commonblogs/abc[subdomainname]/test.php


(This is multi blogs)
RewriteCond %{HTTP_HOST} ^([a-zA-Z0-9]{3,})\.idealwebtools.\.com
RewriteCond %{REQUEST_URI} !/common-blogs/*
RewriteCond %{REQUEST_URI} !/styles-for-common-blogs/*
RewriteRule (.*) /commonblogs/$1 [L]


Over here all the request from subdomain (with more than 3 letters) will get executed from commonblogs folder than public_html, this .htaccess should be placed at public_html (doc root) level.

Hope it helps.