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