SYNOPSIS

substr:string(str:string,start:long,length:long)

ARGUMENTS

str

the string to take a substring from

start

starting position of the extracted string (first character is 0)

length

length of string to return

DESCRIPTION

Returns the substring of the given string at the given start position with the given length (or smaller if the length of the original string is less than start + length, or length is bigger than MAXSTRINGLEN).