.\"extract a substring from a string
.TH extract 3

.SH NAME
extract() - extract a substring from a string

.SH SYNOPSIS
string extract( string str, int from, int to );

.SH DESCRIPTION
extract() returns as a string the characters in <str> from <from> to
<to>, inclusive.  The first character in the string is number 0.  If
<to> isn't specified, the string will be from character <from> to the
end of the string.

.SH SEE ALSO
sscanf(3), explode(3)