Regular Expressions 101

Pro

(?s)applies the following effective flags to the remainder of the pattern: gms

s modifier: single line. Allows a dot to match line terminators

selthe literal text sel (case sensitive)

Positive Lookahead(?=((?!tbl).)*?prm)

Group 1((?!tbl).)*?

*?repeats the group contents below any number of times:

Negative Lookahead(?!tbl)

tblthe literal text tbl (case sensitive)

.any character

prmthe literal text prm (case sensitive)

Positive Lookahead(?=(?1)*?frm)

(?1)*?calls group 1 as a subroutine, repeated any number of times

frmthe literal text frm (case sensitive)

(?1)*calls group 1 as a subroutine, repeated any number of times

tblthe literal text tbl (case sensitive)

Global pattern flags

g modifier: global. Finds all matches instead of stopping after the first

m modifier: multiline. Causes ^ and $ to match the start and end of each line, not only the start and end of the string

Detailed match information will be displayed here automatically.

25 tokens

Regular Expression

(?s)sel(?=((?!tbl).)*?prm)(?=(?1)*?frm)(?1)*tbl

New

1 fgj sel dfjkd prm jfkdl frm jkl tbl klk

2 ledk prm jkl jkk frm jkl tbl jkl fjj

3 jklj sel prm kljlk jkjkl jkkl tbl emel

4 rui jkljl sel jklj jklj prm jkjl

5 jljkj frm jkljl jlj tbl mjljlk

Extraction

1 fgj sel dfjkd prm jfkdl frm jkl tbl klk

2 ledk prm jkl jkk frm jkl tbl jkl fjj

3 jklj sel prm kljlk jkjkl jkkl tbl emel

4 rui jkljl sel jklj jklj prm jkjl

5 jljkj frm jkljl jlj tbl mjljlk