regex101: PCRE (Legacy) Match Workspace

Definition Group(?(DEFINE) (?P<realEnd> (?(3)\>) (?(4)\)) (?(5)\]) (?(6)\}) (?(7)\7) ) )

Group realEnd(?P<realEnd> (?(3)\>) (?(4)\)) (?(5)\]) (?(6)\}) (?(7)\7) )

Condition(?(3)\>)

Uses the first branch if group 3 matched

If the condition is true, match this branch:\>

\>the literal > (62₁₀ / 76₈ / 3E₁₆)

Condition(?(4)\))

Uses the first branch if group 4 matched

If the condition is true, match this branch:\)

\)the literal ) (41₁₀ / 51₈ / 29₁₆)

Condition(?(5)\])

Uses the first branch if group 5 matched

If the condition is true, match this branch:\]

\]the literal ] (93₁₀ / 135₈ / 5D₁₆)

Condition(?(6)\})

Uses the first branch if group 6 matched

If the condition is true, match this branch:\}

\}the literal } (125₁₀ / 175₈ / 7D₁₆)

Condition(?(7)\7)

Uses the first branch if group 7 matched

If the condition is true, match this branch:\7

\7the text saved by group 7

Comment: Ограничитель 1

Group 2((\<)|(\()|(\[)|(\{)| ((?=[[:ascii:]])[^\s\w\\\)\]\}\>]))

1st Alternative(\<)

Group 3(\<)

\<the literal < (60₁₀ / 74₈ / 3C₁₆)

2nd Alternative(\()

Group 4(\()

\(the literal ( (40₁₀ / 50₈ / 28₁₆)

3rd Alternative(\[)

Group 5(\[)

\[the literal [ (91₁₀ / 133₈ / 5B₁₆)

4th Alternative(\{)

Group 6(\{)

\{the literal { (123₁₀ / 173₈ / 7B₁₆)

5th Alternative ((?=[[:ascii:]])[^\s\w\\\)\]\}\>])

Group 7((?=[[:ascii:]])[^\s\w\\\)\]\}\>])

Positive Lookahead(?=[[:ascii:]])

Character Class[[:ascii:]]

[:ascii:]a character with ASCII value 0 through 127

Negated Character Class[^\s\w\\\)\]\}\>]

Comment: Шаблон

Group 8( (?: \\. | # что-то экранированое ИЛИ [\w\d\s]++ | # литералы, которые не могут быть ограничителем ИЛИ (?!(?P>realEnd)). # что угодно кроме ограничителя )*+ )

Comment: Ограничитель 2

(?P>realEnd)calls group realEnd as a subroutine

Comment: Модификаторы шаблонов

Comment: PHP [mixXsuUAJ] JavaScript [gmi] python [gmixsu]

Group 9((?:[mixXsuUAJ]*)|(?(?=.*?[mixXsuUAJ]+)[mixXsuUAJ]+))

Global pattern flags

x modifier: extended. Ignores unescaped whitespace and comments outside character classes

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

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

u modifier: unicode. Treats the pattern and subject as UTF-16

Search reference

Regular Expression

(?(DEFINE)
  (?P<realEnd>
    (?(3)\>)
    (?(4)\))
    (?(5)\])
    (?(6)\})
    (?(7)\7)
  )
)
#Ограничитель 1
((\<)|(\()|(\[)|(\{)|
((?=[[:ascii:]])[^\s\w\\\)\]\}\>]))
#Шаблон
(
  (?:
    \\. | # что-то экранированое ИЛИ
    [\w\d\s]++ | # литералы, которые не могут быть ограничителем ИЛИ
    (?!(?P>realEnd)). # что угодно кроме ограничителя
  )*+
)
#Ограничитель 2
(?P>realEnd)
#Модификаторы шаблонов
#PHP [mixXsuUAJ] JavaScript [gmi] python [gmixsu]
((?:[mixXsuUAJ]*)|(?(?=.*?[mixXsuUAJ]+)[mixXsuUAJ]+))

New

test $ffsd\$ggg\\\\\\\\$iU

Regular Expressions 101

Regular Expression

Substitution