8000 [Validator] PHP 7.4 uninitialized typed property handling by SpiGAndromeda · Pull Request #14376 · symfony/symfony-docs · GitHub
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[Validator] PHP 7.4 uninitialized typed property handling #14376

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Merged
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Jan 8, 2021
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[Validator] PHP 7.4 uninitialized typed property handling #14376

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7 changes: 7 additions & 0 deletions validation.rst
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Expand Up @@ -611,6 +611,13 @@ class to have at least 3 characters.
}
}

.. caution::

With PHP 7.4, typed properties were introduced. If a property is accessed
before a value is assigned (explicitly or as a default value), PHP will
throw an exception. To avoid that, the Validator will use ``null`` as the
properties value if it's uninitialized.

.. index::
single: Validation; Getter constraints

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