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Community Library Entry
1
Regular Expression
PCRE (PHP <7.3)
/
(
[
A
-
Z
]
[
a
-
z
]
?
)
(
\d
*
(?:
(?:
[
\.
|
\,
]
)
\d
+
(?:
\%
)?
)?
)
|
(?:
[
\(
|
\[
]
)
(
[^
()
]
*
(?:
(?:
[
\(
|
\[
]
)
.
*
(?:
[
\)
|
\]
]
)
)?
[^
()
]
*
)
(?:
[
\)
|
\]
]
)
(
\d
*
(?:
(?:
[
\.
|
\,
]
?
)
\d
+
(?:
\%
)?
)
)
/
g
Open regex in editor
Description
Parses some chemical formula
Submitted by
anonymous
-
9 years ago