== Why is this an issue?

include::../description.adoc[]

=== Noncompliant code example

[source,php]
----
"(?:number)\d{2}"
----

=== Compliant solution

[source,php]
----
"number\d{2}"
"(?:number)?\d{2}"
----

=== Exceptions

This rule does not report an issue if the non-capturing group is an alternation.

[source,php]
----
"(?:number|string)"
----

== Resources

https://www.php.net/manual/en/regexp.reference.subpatterns.php[Subpatterns] - PHP Documentation

include::../implementation.adoc[]