Hello,
i want to download link's data
or save its data on file
how can i do that in PHP?

AND
for example:
http://nseindia.com/companytracker/cmtracker.jsp?symbol=HDFCBANK&cName=cmtracker_nsedef.css
from this link i want to store data of
"Issued Cap" section

but when I see this in view page source then it do not show me that data.
why its so?

It's a Java applet. I don't think you can get at it's data just like that.

ok
then any other way to get its data?

any other way to get its data?

Not sure, see if they provide access to an API.