39 lines
1.7 KiB
Markdown
39 lines
1.7 KiB
Markdown
VarExporter Component
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=====================
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The VarExporter component allows exporting any serializable PHP data structure to
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plain PHP code. While doing so, it preserves all the semantics associated with
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the serialization mechanism of PHP (`__wakeup`, `__sleep`, `Serializable`,
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`__serialize`, `__unserialize`).
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It also provides an instantiator that allows creating and populating objects
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without calling their constructor nor any other methods.
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The reason to use this component *vs* `serialize()` or
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[igbinary](https://github.com/igbinary/igbinary) is performance: thanks to
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OPcache, the resulting code is significantly faster and more memory efficient
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than using `unserialize()` or `igbinary_unserialize()`.
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Unlike `var_export()`, this works on any serializable PHP value.
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It also provides a few improvements over `var_export()`/`serialize()`:
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* the output is PSR-2 compatible;
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* the output can be re-indented without messing up with `\r` or `\n` in the data
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* missing classes throw a `ClassNotFoundException` instead of being unserialized to
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`PHP_Incomplete_Class` objects;
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* references involving `SplObjectStorage`, `ArrayObject` or `ArrayIterator`
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instances are preserved;
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* `Reflection*`, `IteratorIterator` and `RecursiveIteratorIterator` classes
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throw an exception when being serialized (their unserialized version is broken
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anyway, see https://bugs.php.net/76737).
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Resources
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---------
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* [Documentation](https://symfony.com/doc/current/components/var_exporter.html)
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* [Contributing](https://symfony.com/doc/current/contributing/index.html)
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* [Report issues](https://github.com/symfony/symfony/issues) and
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[send Pull Requests](https://github.com/symfony/symfony/pulls)
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in the [main Symfony repository](https://github.com/symfony/symfony)
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