EXPORT - retain variables across invocations

SYNOPSIS

<EXPORT $var [$var ...] [flags]>

DESCRIPTION
The EXPORT directive marks the given variables for ``export'' to the next invocation of the script. Their values will be retrieved the next time the script is run.

EXPORTed variables are saved when the special variable $url is printed, whose value is the URL to re-invoke the script (see p. ). Variables EXPORTed with the QUERY flag are saved to $urlq, whose value is a URL-encoded query string (starting with a ``?'' if non-empty) containing the QUERY variables.

When a user then clicks the $url link, not only is the script invoked as usual, but all variables EXPORTed at the time the $url was printed, are restored in the new invocation. Thus the script can remember a user's query, login id, etc. across multiple runs.

• EXPORT Types
• Flags