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Documented the missing YAML flags #9205

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486c0c3
Documented the missing YAML flags
javiereguiluz Feb 5, 2018
a235d71
Fixed issues
javiereguiluz Feb 6, 2018
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44 changes: 44 additions & 0 deletions components/yaml.rst
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Original file line number Diff line number Diff line change
Expand Up @@ -267,6 +267,30 @@ representation of the object.
parsers will likely not recognize the ``php/object`` tag and non-PHP
implementations certainly won't - use with discretion!

Parsing and Dumping Objects as Maps
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

.. versionadded:: 3.2
Support for parsing and dumping objects as maps was introduced in Symfony 3.2.

You can dump objects as Yaml maps by using the ``DUMP_OBJECT_AS_MAP`` flag::

$object = new \stdClass();
$object->foo = 'bar';

$dumped = Yaml::dump(array('data' => $object), 2, 4, Yaml::DUMP_OBJECT_AS_MAP);
// $dumped = "data:\n foo: bar"

And parse them by using the ``PARSE_OBJECT_FOR_MAP`` flag::

$parsed = Yaml::parse($dumped, Yaml::PARSE_OBJECT_FOR_MAP);
var_dump(is_object($parsed)); // true
var_dump(is_object($parsed->data)); // true
echo $parsed->data->foo; // bar

The YAML component uses PHP's ``(array)`` casting to generate a string
representation of the object as a map.

.. _invalid-types-and-object-serialization:

Handling Invalid Types
Expand Down Expand Up @@ -333,6 +357,26 @@ syntax to parse them as proper PHP constants::
$parameters = Yaml::parse($yaml, Yaml::PARSE_CONSTANT);
// $parameters = array('foo' => 'PHP_INT_SIZE', 'bar' => 8);

Parsing and Dumping of Binary Data
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

.. versionadded:: 3.2
Support for parsing and dumping binary data was introduced in Symfony 3.2.

You can dump binary data by using the ``DUMP_BASE64_BINARY_DATA`` flag::

$imageContents = file_get_contents(__DIR__.'/images/logo.png');

$dumped = Yaml::dump(array('logo' => $imageContents), 2, 4, Yaml::DUMP_BASE64_BINARY_DATA);
// logo: !!binary iVBORw0KGgoAAAANSUhEUgAAA6oAAADqCAY...

Binary data is automatically parsed if they include the ``!!binary`` YAML tag
(there's no need to pass any flag to the Yaml parser)::

$dumped = 'logo: !!binary iVBORw0KGgoAAAANSUhEUgAAA6oAAADqCAY...';
$parsed = Yaml::parse($dumped);
$imageContents = $parsed['logo'];

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

Expand Down