regex101: PCRE (Legacy) Match Workspace

Group 1([^\\}<]{3}|][^]]|^)

1st Alternative[^\\}<]{3}

Negated Character Class[^\\}<]{3}

{3}matches exactly 3 characters outside the set below:

\\the literal \ (92₁₀ / 134₈ / 5C₁₆)

}the literal } (125₁₀ / 175₈ / 7D₁₆)

<the literal < (60₁₀ / 74₈ / 3C₁₆)

2nd Alternative][^]]

]the literal ] (93₁₀ / 135₈ / 5D₁₆)

Negated Character Class[^]]

]the literal ] (93₁₀ / 135₈ / 5D₁₆)

3rd Alternative^

^start of line

.?optionally matches any character (except for line terminators)

Character Class[$PG]

$the literal $ (36₁₀ / 44₈ / 24₁₆)

Pthe literal P (80₁₀ / 120₈ / 50₁₆) (case sensitive)

Gthe literal G (71₁₀ / 107₈ / 47₁₆) (case sensitive)

$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

Search reference

Regular Expression

([^\\}<]{3}|][^]]|^).?[$PG]$

New

The next answer has to match the following strings:

PPCG
^P
^[P^]P
[^?][PG]$
(?<!\\..)(?!]).$
^[\w^]*$|!|]P|G]\$$
!|[^?]P(CG|G..)?$
[^])]\$|^\^?P|P.\].$
([.$?]|G\])\$$|^\^?P|\]P$
([P.$?]\$|[]^]P|G\]\$|CG)$
!|((G.|P|\.)\$|[^?]P|CG)$
^[(!P]|G..$|]..\||[^?]P$
^.{3,23}[.-~]..\$$|[^P?][PG]$

And fail on these strings:

[PPCG]
^[P\^]
[^\]]$
^\^?P
[^?][PG]$|<|PG
^[^\\|]*(\\\\)+[^\\|]*[^\]]$
^(.{,4}|.{9}|.{16,19}|.{5}P)$
^[^?]*[PG]$|[?$].*\$$
^[^[]P|]P|(G]|[.])\$$
\..$|!|\|G|^[\^P]P|P\^|G.\$$
...\^.P|^!|G]\$$|w|<!|^\^?P
([^\\}<]{3}|][^]]|^).?[$PG]$

Regular Expressions 101

Regular Expression

Extraction