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[OptionsResolver] Support union of types #20536

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Jan 9, 2025
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[OptionsResolver] Support union of types #20536

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7 changes: 7 additions & 0 deletions components/options_resolver.rst
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Original file line number Diff line number Diff line change
Expand Up @@ -305,13 +305,20 @@ correctly. To validate the types of the options, call

// specify multiple allowed types
$resolver->setAllowedTypes('port', ['null', 'int']);
// which is similar to
$resolver->setAllowedTypes('port', 'int|null');

// check all items in an array recursively for a type
$resolver->setAllowedTypes('dates', 'DateTime[]');
$resolver->setAllowedTypes('ports', 'int[]');
$resolver->setAllowedTypes('endpoints', '(int|string)[]');
}
}

.. versionadded:: 7.3

Union of type, using the ``|`` syntax, was introduced in Symfony 7.3.

You can pass any type for which an ``is_<type>()`` function is defined in PHP.
You may also pass fully qualified class or interface names (which is checked
using ``instanceof``). Additionally, you can validate all items in an array
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