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75 lines
1.4 KiB
Markdown
75 lines
1.4 KiB
Markdown
---
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date: 2020-11-11
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id: a334a0bb-a462-4e8f-94df-6a9985a2c5e3
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title: Symfony VarExporter Component
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---
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# Introduction
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Introduced in [Symfony 4.2](20201111101706-symfony_4_2), the VarExporter
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Component is a better alternative to PHP's `var_export()` function. The
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`var_export()` function outputs or returns a parsable string
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representation of a variable. It is similar to `var_dump()` with one
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exception: the returned representation is valid PHP code. Symfony's
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`export()` function is similar, but adds lots of useful features to it.
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# Syntax
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## Array
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``` php
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$data = array(123, array('abc'));
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$result = VarExporter::export($data);
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```
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generates
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``` php
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<?php
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return [
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123,
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[
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'abc',
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],
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];
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```
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## Class
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``` php
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class MySerializable implements \Serializable
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{
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public function serialize()
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{
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return '123';
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}
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public function unserialize($data)
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{
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// do nothing
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}
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}
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$data = array(new MySerializable(), new MySerializable());
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$result = VarExporter::export($data);
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```
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generates
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``` php
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<?php
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return \Symfony\Component\VarExporter\Internal\Configurator::pop(
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\Symfony\Component\VarExporter\Internal\Registry::push([], [], [
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'C:50:"Symfony\\Component\\VarExporter\\Tests\\MySerializable":3:{123}',
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]),
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null,
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[],
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[
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\Symfony\Component\VarExporter\Internal\Registry::$objects[0],
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\Symfony\Component\VarExporter\Internal\Registry::$objects[0],
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],
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[]
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);
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```
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