The following characters are reserved for regular expression control. They must be escaped; that is, prefixed with backslash (\) when they appear as part of a normal matching pattern (that is, not part of an expression), except where noted otherwise.
Name | Symbol | Proper Syntax |
|---|---|---|
backslash | \ | \\ |
dot (period) | . | \. |
pipe | | | \| |
dash (hyphen) | - | \- |
carat | ^ | \^ |
dollar symbol | $ | \$ |
open paren | ( | \( |
close paren | ) | \) |
open bracket | [ | \[ |
close bracket | ] | \] |
Pattern | Read as: |
|---|---|
(text) | text |
\(text) | \(text\) |
www.trellix.com | www*trellix*com, where * is a single wildcard |
www\.trellix\.com | www.trellix.com |