Regular
Expressions
101
@regex101
Donate
Sponsor
Contact
Bug Reports & Feedback
Wiki
Whats new?
Regex Editor
Regex Library
Account
Regex Quiz
Settings
Live Help
Consider a donation
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
Golang
Java 8
Function
Match
Substitution
List
Unit Tests
Tools
Code Generator
Regex Debugger
Sponsor
Jamstack at Scale
Explanation
/
\(
?
\d
{3}
\)
?
[
-
]
\d
{3}
-
\d
{4}
/
g
\(
matches the character
(
with index
40
10
(
28
16
or
50
8
) literally (case sensitive)
?
matches the previous token between
zero
and
one
times, as many times as possible, giving back as needed
(greedy)
\d
matches a digit (equivalent to
[0-9]
)
{3}
matches the previous token exactly
3
times
\)
matches the character
)
with index
41
10
(
29
16
or
51
8
) literally (case sensitive)
?
matches the previous token between
zero
and
one
times, as many times as possible, giving back as needed
(greedy)
Match a single character present in the list below
[
-
]
-
matches the character
-
with index
45
10
(
2D
16
or
55
8
) literally (case sensitive)
This hyphen is treated literally, which might be confusing for others. Consider escaping it or placing at the start or end of the class!
matches the character
with index
32
10
(
20
16
or
40
8
) literally (case sensitive)
\d
matches a digit (equivalent to
[0-9]
)
{3}
matches the previous token exactly
3
times
-
matches the character
-
with index
45
10
(
2D
16
or
55
8
) literally (case sensitive)
\d
matches a digit (equivalent to
[0-9]
)
{4}
matches the previous token exactly
4
times
Global pattern flags
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
v3
No Match
/
/
g
Test String
Code Generator
Language
AutoIt
C#
Golang
Java
JavaScript
Perl
PHP
Python
Ruby
Rust
SED
Swift 5.2
Generated Code
Loading code sample...
Please keep in mind that these code samples are automatically generated and are not guaranteed to work. If you find any syntax errors, feel free to submit a bug report.
For a full regex reference for Rust, please visit:
https://docs.rs/regex/latest/regex/
Regular
Expressions
101
Please wait while the app is loading...
Please enable JavaScript to use this web application.