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Package polyfill-deepclone
Short Description Symfony polyfill for the deepclone extension
License MIT
Homepage https://symfony.com
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Informations about the package polyfill-deepclone
Symfony Polyfill / DeepClone
This package provides a pure-PHP implementation of the functions and exception classes from the deepclone extension:
deepclone_to_array(mixed $value, ?array $allowed_classes = null, bool $allow_named_closures = false): array— converts any serializable PHP value graph into a pure array (only scalars and nested arrays, no objects).deepclone_from_array(array $data, ?array $allowed_classes = null, bool $allow_named_closures = false): mixed— rebuilds the value graph from the array, preserving object identity, references, cycles, and private property state.DeepClone\NotInstantiableExceptionandDeepClone\ClassNotFoundException
When the native deepclone extension is loaded, this polyfill does nothing —
the extension provides the same functions 4–5× faster.
The array representation preserves PHP's copy-on-write for strings and scalar
arrays, making repeated cloning of a prototype significantly more memory
efficient than unserialize(serialize()). It also serves as a cache-friendly
serialization format: when dumped via var_export() into a .php file,
OPcache maps the array into shared memory, making deserialization essentially
free.
This is the same wire format used by Symfony's VarExporter\DeepCloner.
More information can be found in the main Polyfill README.
License
This library is released under the MIT license.
