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[Yaml] Dump null as tilde #12071

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Aug 5, 2019
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[Yaml] Dump null as tilde #12071

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[Yaml] Dump null as tilde
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@OskarStark
OskarStark committed Aug 5, 2019
commit 68cf0cfd6b33b6c3c48026c41da18286edbca43f
17 changes: 17 additions & 0 deletions components/yaml.rst
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Expand Up @@ -375,6 +375,23 @@ objects, they are automatically transformed into YAML tags::
$dumped = Yaml::dump($data);
// $dumped = '!my_tag { foo: bar }'

Dumping null
~~~~~~~~~~~~

``null`` values will be represented with ``null`` by default::

$dumped = Yaml::dump(array('foo' => null));
// foo: null

You can represent them with ``~`` by using the ``DUMP_NULL_AS_TILDE`` flag::

$dumped = Yaml::dump(array('foo' => null), 2, 4, Yaml::DUMP_NULL_AS_TILDE);
// foo: ~

.. versionadded:: 4.4

The flag to dump ``null`` as ``~`` was introduced in Symfony 4.4.

Syntax Validation
~~~~~~~~~~~~~~~~~

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