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3ce41d71a4
* Clean up issues list, add documentation to help with named variadic confusion. * Add ComplexFunction and ComplexMethod back to issues list. I removed them because the documentation files don't exist, but they're used and the documentation just needs to be added.
41 lines
730 B
Markdown
41 lines
730 B
Markdown
# DuplicateArrayKey
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Emitted when an array has a key more than once
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```php
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<?php
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$arr = [
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'a' => 'one',
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'b' => 'two',
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'c' => 'this text will be overwritten by the next line',
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'c' => 'three',
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];
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```
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This can be caused by variadic arguments if `@no-named-arguments` is not specified:
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```php
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<?php
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function foo($bar, ...$baz): array
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{
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return [$bar, ...$baz]; // $baz is array<array-key, mixed> since it can have named arguments
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}
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```
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## How to fix
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Remove the offending duplicates:
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```php
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<?php
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$arr = [
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'a' => 'one',
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'b' => 'two',
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'c' => 'three',
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];
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```
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The first matching `'c'` key was removed to prevent a change in behaviour (any new duplicate keys overwrite the values of previous ones).
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