Regular Expressions 101

asdthe literal text asd (case sensitive)

Group 1(([^<]|< *([^ r]|r[^e]|re[^f]))*</ref>)

Group 2([^<]|< *([^ r]|r[^e]|re[^f]))*

*repeats the group contents below any number of times:

1st Alternative[^<]

Negated Character Class[^<]

<the literal < (60₁₀ / 74₈ / 3C₁₆)

2nd Alternative< *([^ r]|r[^e]|re[^f])

<the literal < (60₁₀ / 74₈ / 3C₁₆)

*the literal (32₁₀ / 40₈ / 20₁₆) , repeated any number of times

Group 3([^ r]|r[^e]|re[^f])

1st Alternative[^ r]

Negated Character Class[^ r]

the literal (32₁₀ / 40₈ / 20₁₆)

rthe literal r (114₁₀ / 162₈ / 72₁₆) (case sensitive)

2nd Alternativer[^e]

rthe literal r (114₁₀ / 162₈ / 72₁₆) (case sensitive)

Negated Character Class[^e]

ethe literal e (101₁₀ / 145₈ / 65₁₆) (case sensitive)

3rd Alternativere[^f]

rethe literal text re (case sensitive)

Negated Character Class[^f]

fthe literal f (102₁₀ / 146₈ / 66₁₆) (case sensitive)

</ref>the literal text </ref> (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.

Search reference

Regular Expression

asd(([^<]|< *([^ r]|r[^e]|re[^f]))*</ref>)

New

<ref>asd</ref><ref>altro</ref>
asd <ref>altro</ref>
<ref>asd <br></ref><ref>altro</ref>

new\1