Regular Expressions 101

^start of line

abc4the literal text abc4 (case sensitive)

Non-Capturing Group(?:.*(?:[^p].{2}|p[^r].{1}|pr[^e])|.{0,2})

1st Alternative.*(?:[^p].{2}|p[^r].{1}|pr[^e])

.*any character (except for line terminators), repeated any number of times

Non-Capturing Group(?:[^p].{2}|p[^r].{1}|pr[^e])

1st Alternative[^p].{2}

Negated Character Class[^p]

pthe literal p (112₁₀ / 160₈ / 70₁₆) (case sensitive)

.{2}any character (except for line terminators), repeated exactly 2 times

2nd Alternativep[^r].{1}

pthe literal p (112₁₀ / 160₈ / 70₁₆) (case sensitive)

Negated Character Class[^r]

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

.{1}any character (except for line terminators), repeated exactly 1 time

3rd Alternativepr[^e]

prthe literal text pr (case sensitive)

Negated Character Class[^e]

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

2nd Alternative.{0,2}

.{0,2}any character (except for line terminators), repeated between 0 and 2 times

$end of line

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

^abc4(?:.*(?:[^p].{2}|p[^r].{1}|pr[^e])|.{0,2})$

New

abc4back
abc4backpre
abc4front
abc4frontpre
abc3side
abc3sidepre
xyz4over
xyz4overpre
abc4