Regular Expressions 101

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  • PCRE2 (PHP >=7.3)
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/
.\\(.)\\(.)\\(.)( \((\d)\))?\\(\d)-(.)\.flac$
/
i
.
matches any character (except for line terminators)
* matches the previous token between zero and unlimited times, as many times as possible, giving back as needed (greedy)
\\ matches the character \ literally (case insensitive)
1st Capturing Group
(.)
.
matches any character (except for line terminators)
* matches the previous token between zero and unlimited times, as many times as possible, giving back as needed (greedy)
\\ matches the character \ literally (case insensitive)
2nd Capturing Group
(.)
.
matches any character (except for line terminators)
* matches the previous token between zero and unlimited times, as many times as possible, giving back as needed (greedy)
\\ matches the character \ literally (case insensitive)
3rd Capturing Group
(.)
.
matches any character (except for line terminators)
*? matches the previous token between zero and unlimited times, as few times as possible, expanding as needed (lazy)
4th Capturing Group
( \((\d)\))?
? matches the previous token between zero and one times, as many times as possible, giving back as needed (greedy)
matches the character literally (case insensitive)
\( matches the character ( literally (case insensitive)
5th Capturing Group
(\d)
\) matches the character ) literally (case insensitive)
\\ matches the character \ literally (case insensitive)
6th Capturing Group
(\d)
- matches the character - literally (case insensitive)
7th Capturing Group
(.)
\. matches the character . literally (case insensitive)
flac matches the characters flac literally (case insensitive)
$ asserts position at the end of the string
Global pattern flags
i modifier: insensitive. Case insensitive match (ignores case of [a-zA-Z])
Your regular expression does not match the subject string.

Regular Expression
No Match

/
/
i

Test String

Code Generator

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 JavaScript, please visit: https://developer.mozilla.org/en/docs/Web/JavaScript/Guide/Regular_Expressions