regex101: PCRE (Legacy) Match Workspace

Group 1((|\s|\n)*subnet(|\s|\n)*((\d{1,3}.){3}(\d{1,3}))(|\s|\n)*netmask(|\s|\n)*((\d{1,3}.){3}(\d{1,3}))(|\s|\n)*\{(|\s|\n)+((|\s|\n)+host(|\s|\n)*(\w+)(|\s|\n)*\{(|\s|\n)*(\w*)\:(\w*)\;(|\s|\n)*\}(|\s|\n)*)*\})

Group 2(|\s|\n)*

*repeats the group contents below any number of times:

1st Alternative — matches an empty string

2nd Alternative\s

\sany whitespace character

3rd Alternative\n

\na line-feed (newline) character (ASCII 10)

subnetthe literal text subnet (case sensitive)

Group 3(|\s|\n)*

*repeats the group contents below any number of times:

1st Alternative — matches an empty string

2nd Alternative\s

\sany whitespace character

3rd Alternative\n

\na line-feed (newline) character (ASCII 10)

Group 4((\d{1,3}.){3}(\d{1,3}))

Group 5(\d{1,3}.){3}

{3}repeats the group contents below exactly 3 times:

\d{1,3}a digit, repeated between 1 and 3 times

.any character (except for line terminators)

Group 6(\d{1,3})

\d{1,3}a digit, repeated between 1 and 3 times

Group 7(|\s|\n)*

*repeats the group contents below any number of times:

1st Alternative — matches an empty string

2nd Alternative\s

\sany whitespace character

3rd Alternative\n

\na line-feed (newline) character (ASCII 10)

netmaskthe literal text netmask (case sensitive)

Group 8(|\s|\n)*

*repeats the group contents below any number of times:

1st Alternative — matches an empty string

2nd Alternative\s

\sany whitespace character

3rd Alternative\n

\na line-feed (newline) character (ASCII 10)

Group 9((\d{1,3}.){3}(\d{1,3}))

Group 10(\d{1,3}.){3}

{3}repeats the group contents below exactly 3 times:

\d{1,3}a digit, repeated between 1 and 3 times

.any character (except for line terminators)

Group 11(\d{1,3})

\d{1,3}a digit, repeated between 1 and 3 times

Group 12(|\s|\n)*

*repeats the group contents below any number of times:

1st Alternative — matches an empty string

2nd Alternative\s

\sany whitespace character

3rd Alternative\n

\na line-feed (newline) character (ASCII 10)

\{the literal { (123₁₀ / 173₈ / 7B₁₆)

Group 13(|\s|\n)+

+repeats the group contents below at least once:

1st Alternative — matches an empty string

2nd Alternative\s

\sany whitespace character

3rd Alternative\n

\na line-feed (newline) character (ASCII 10)

Group 14((|\s|\n)+host(|\s|\n)*(\w+)(|\s|\n)*\{(|\s|\n)*(\w*)\:(\w*)\;(|\s|\n)*\}(|\s|\n)*)*

\}the literal } (125₁₀ / 175₈ / 7D₁₆)

Search reference

Regular Expression

((|\s|\n)*subnet(|\s|\n)*((\d{1,3}.){3}(\d{1,3}))(|\s|\n)*netmask(|\s|\n)*((\d{1,3}.){3}(\d{1,3}))(|\s|\n)*\{(|\s|\n)+((|\s|\n)+host(|\s|\n)*(\w+)(|\s|\n)*\{(|\s|\n)*(\w*)\:(\w*)\;(|\s|\n)*\}(|\s|\n)*)*\})

New

#DHCP Server Configuration file.

deny unknown-clients;

subnet 10.8.140.2 netmask 255.255.255.255 {
    host example{
            optian:param; 
    }
    host example2{
            option2:param2;
    }
}

subnet 20.8.110.1 netmask 255.255.255.255 {
    host example{
            optian:param; 
    }
}

subnet 20.8.110.1 netmask 255.255.255.255 {

}

Regular Expressions 101

Regular Expression

Extraction