Regular
Expressions
101
@regex101
Follow me on twitter!
Donate
Like regex101? Support it by donating!
Sponsor
Become a sponsor!
Contact
Send me an email
Bug Reports & Feedback
Bugs or suggestions go here
Wiki
Wiki (Info & FAQ)
Whats new?
Whats new?
Regex Editor
Regex Editor
Regex Library
Regex Library
Account
Account
Regex Quiz
Regex Quiz
Settings
Settings
Live Help
Live Help
Consider a donation
Consider a donation
Become a sponsor
Become a sponsor
Save & Share
Save Regex
ctrl+s
Update Regex
ctrl+⇧+s
Flavor
PCRE2 (PHP >=7.3)
PCRE (PHP <7.3)
ECMAScript (JavaScript)
Python 2.7
Golang (RE2)
Function
Match
Substitution
List
Unit Tests
Tools
Code Generator
Regex Debugger
Sponsor
Jamstack at Scale
Explanation
/
(?:
\s
*
(?=
\w
+
\.
|
.
*
as
\s
+
|)(
\*
|
\w
+
)(?=
\s
*
(?=
,
|
from
)
)
)
/
ig
Non-capturing group
(?:
\s
*
(?=
\w
+
\.
|
.
*
as
\s
+
|)(
\*
|
\w
+
)(?=
\s
*
(?=
,
|
from
)
)
)
\s
*
matches any whitespace character (equal to
[\r\n\t\f\v ]
)
*
Quantifier
— Matches between
zero
and
unlimited
times, as many times as possible, giving back as needed
(greedy)
Positive Lookahead
(?=
\w
+
\.
|
.
*
as
\s
+
|)
Assert that the Regex below matches
1st Alternative
\w
+
\.
\w
+
matches any word character (equal to
[a-zA-Z0-9_]
)
+
Quantifier
— Matches between
one
and
unlimited
times, as many times as possible, giving back as needed
(greedy)
\.
matches the character
.
literally (case insensitive)
2nd Alternative
.
*
as
\s
+
.
*
matches any character (except for line terminators)
Line terminator(s) are \n
*
Quantifier
— Matches between
zero
and
unlimited
times, as many times as possible, giving back as needed
(greedy)
as
matches the characters
as
literally (case insensitive)
\s
+
matches any whitespace character (equal to
[\r\n\t\f\v ]
)
+
Quantifier
— Matches between
one
and
unlimited
times, as many times as possible, giving back as needed
(greedy)
3rd Alternative
—
null
, matches any position
1st Capturing Group
(
\*
|
\w
+
)
1st Alternative
\*
\*
matches the character
*
literally (case insensitive)
2nd Alternative
\w
+
\w
+
matches any word character (equal to
[a-zA-Z0-9_]
)
+
Quantifier
— Matches between
one
and
unlimited
times, as many times as possible, giving back as needed
(greedy)
Positive Lookahead
(?=
\s
*
(?=
,
|
from
)
)
Assert that the Regex below matches
\s
*
matches any whitespace character (equal to
[\r\n\t\f\v ]
)
*
Quantifier
— Matches between
zero
and
unlimited
times, as many times as possible, giving back as needed
(greedy)
Positive Lookahead
(?=
,
|
from
)
Assert that the Regex below matches
1st Alternative
,
2nd Alternative
from
Global pattern flags
i modifier:
i
nsensitive. Case insensitive match (ignores case of
[a-zA-Z]
)
g modifier:
g
lobal. All matches (don't return after first match)
Match Information
Your regular expression does not match the subject string.
Try launching the debugger to find out why.
Quick Reference
Regular Expression
v2
Select Regex Version
No Match
/
Change delimiter
/
ig
Set Regex Options
Copy to clipboard
Test String
Regular
Expressions
101
Please wait while the app is loading...
Please enable JavaScript to use this web application.