| R? |
Matches R, once or not at all |
| R* |
Matches R, zero or more times |
| R+ |
Matches R, one or more times |
| R{n} |
Matches R, exactly n times |
| R{n,} |
Matches R, at least n times |
| R{n,m} |
Matches R, at least n but no more than m times |
R is a regular expression.
Trend Micro
does not recommend using ".*" in a regular expression. ".*" matches
any length of letters and the large number of matches may increase memory
usage and affect performance.
For example:
If the content
is 123456abc, the regular expression ".*abc" match results are:
-
12345abc
-
23455abc
-
3456abc
-
456abc
-
56abc
-
6abc
-
abc
In this example, replace ".*abc" with
"abc" to prevent excessive use of resources.
