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[Yaml] Add flag to dump numeric key as string #17615

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Jan 3, 2023
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[Yaml] Add flag to dump numeric key as string #17615

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16 changes: 16 additions & 0 deletions components/yaml.rst
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Expand Up @@ -418,6 +418,22 @@ you can dump them as ``~`` with the ``DUMP_NULL_AS_TILDE`` flag::
$dumped = Yaml::dump(['foo' => null], 2, 4, Yaml::DUMP_NULL_AS_TILDE);
// foo: ~

Dumping Numeric Keys as Strings
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

By default, digit-only array keys are dumped as integers. You can use the
``DUMP_NUMERIC_KEY_AS_STRING`` flag if you want to dump string-only keys::

$dumped = Yaml::dump([200 => 'foo']);
// 200: foo

$dumped = Yaml::dump([200 => 'foo'], 2, 4, Yaml::DUMP_NUMERIC_KEY_AS_STRING);
// '200': foo

.. versionadded:: 6.3

The ``DUMP_NUMERIC_KEY_AS_STRING`` flag was introduced in Symfony 6.3.

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

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