This rule raises an issue when multiple branches of a regex alternative match the same input.

== Why is this an issue?

include::../description.adoc[]

=== Code examples

==== Noncompliant code example

[source,php,diff-id=1,diff-type=noncompliant]
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"/[ab]|a/"   // Noncompliant: the "|a" is redundant because "[ab]" already matches "a"
"/.*|a/"     // Noncompliant: .* matches everything, so any other alternative is redundant
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==== Compliant solution

[source,php,diff-id=1,diff-type=compliant]
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"/[ab]/"
"/.*/"
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