Why do we use ob_start()?

Question

Do we have any users of Php say 5.6 on a FreeBSD 10.3 system installed from ports?

If so, can you get in touch with me? I'm trying to install pear and not having much luck, getting an error about a missing peclcmd.php file and a zlib extension that make is complaining about but which is in my php install.

Answer 1

Ob_start used to active the output buffering .When output buffering is on all output of the page sent at one time to the browser ,otherwise sometimes we see header errors.