Regular Expressions 101

Pro

abcthe literal text abc (case sensitive)

\[the literal [ (91₁₀ / 133₈ / 5B₁₆)

Positive Lookahead(?=[^][]*z)

Negated Character Class[^][]*

*matches any number of characters outside the set below:

]the literal ] (93₁₀ / 135₈ / 5D₁₆)

[the literal [ (91₁₀ / 133₈ / 5B₁₆)

zthe literal z (122₁₀ / 172₈ / 7A₁₆) (case sensitive)

Positive Lookahead(?=[^][]*4)

Negated Character Class[^][]*

*matches any number of characters outside the set below:

]the literal ] (93₁₀ / 135₈ / 5D₁₆)

[the literal [ (91₁₀ / 133₈ / 5B₁₆)

4the literal 4 (52₁₀ / 64₈ / 34₁₆)

Positive Lookahead(?=[^][]*\?)

Negated Character Class[^][]*

*matches any number of characters outside the set below:

]the literal ] (93₁₀ / 135₈ / 5D₁₆)

[the literal [ (91₁₀ / 133₈ / 5B₁₆)

\?the literal ? (63₁₀ / 77₈ / 3F₁₆)

Positive Lookahead(?=[^][]*;)

Negated Character Class[^][]*

*matches any number of characters outside the set below:

]the literal ] (93₁₀ / 135₈ / 5D₁₆)

[the literal [ (91₁₀ / 133₈ / 5B₁₆)

;the literal ; (59₁₀ / 73₈ / 3B₁₆)

Positive Lookahead(?=[^][]*\*)

Negated Character Class[^][]*

*matches any number of characters outside the set below:

]the literal ] (93₁₀ / 135₈ / 5D₁₆)

[the literal [ (91₁₀ / 133₈ / 5B₁₆)

\*the literal * (42₁₀ / 52₈ / 2A₁₆)

Character Class[z*4?;]+

+matches at least one character from the set below:

zthe literal z (122₁₀ / 172₈ / 7A₁₆) (case sensitive)

*the literal * (42₁₀ / 52₈ / 2A₁₆)

4the literal 4 (52₁₀ / 64₈ / 34₁₆)

?the literal ? (63₁₀ / 77₈ / 3F₁₆)

;the literal ; (59₁₀ / 73₈ / 3B₁₆)

]defthe literal text ]def (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

abc\[(?=[^][]*z)(?=[^][]*4)(?=[^][]*\?)(?=[^][]*;)(?=[^][]*\*)[z*4?;]+]def

New

abc[4;?;z;*]def
abc[4?z*]def
abc[4?z;]def
abc[4;z*]def
abc[;z*]def

Extraction

abc[4;?;z;*]def
abc[4?z*]def
abc[4?z;]def
abc[4;z*]def
abc[;z*]def