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[12.x] Clarify the behavior of collapseWithKeys method #10501

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Jun 17, 2025
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[12.x] Clarify the behavior of collapseWithKeys method #10501

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2 changes: 1 addition & 1 deletion collections.md
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Expand Up @@ -436,7 +436,7 @@ $collapsed->all();
<a name="method-collapsewithkeys"></a>
#### `collapseWithKeys()` {.collection-method}

The `collapseWithKeys` method flattens a collection of arrays or collections into a single collection, keeping the original keys intact:
The `collapseWithKeys` method flattens a collection of arrays or collections into a single collection, keeping the original keys intact. If the collection is already flat, it will return an empty collection:

```php
$collection = collect([
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