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[Yaml] Tweaked the DUMP_NULL_AS_TILDE explanation #12090

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Aug 6, 2019
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[Yaml] Tweaked the DUMP_NULL_AS_TILDE explanation #12090

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14 changes: 7 additions & 7 deletions components/yaml.rst
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Original file line number Diff line number Diff line change
Expand Up @@ -375,17 +375,17 @@ objects, they are automatically transformed into YAML tags::
$dumped = Yaml::dump($data);
// $dumped = '!my_tag { foo: bar }'

Dumping null
~~~~~~~~~~~~
Dumping Null Values
~~~~~~~~~~~~~~~~~~~

``null`` values will be represented with ``null`` by default::
The official YAML specification uses both ``null`` and ``~`` to represent null
values. This component uses ``null`` by default when dumping null values but
you can dump them as ``~`` with the ``DUMP_NULL_AS_TILDE`` flag::

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

.. versionadded:: 4.4
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