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CHANGELOG
=========
3.3.0
-----
* Starting an unquoted string with a question mark followed by a space is
deprecated and will throw a `ParseException` in Symfony 4.0.
* Deprecated support for implicitly parsing non-string mapping keys as strings.
Mapping keys that are no strings will lead to a `ParseException` in Symfony
4.0. Use quotes to opt-in for keys to be parsed as strings.
Before:
```php
$yaml = <<<YAML
null: null key
true: boolean true
2.0: float key
YAML;
Yaml::parse($yaml);
```
After:
```php
$yaml = <<<YAML
"null": null key
"true": boolean true
"2.0": float key
YAML;
Yaml::parse($yaml);
```
* Omitted mapping values will be parsed as `null`.
* Omitting the key of a mapping is deprecated and will throw a `ParseException` in Symfony 4.0.
* Added support for dumping empty PHP arrays as YAML sequences:
```php
Yaml::dump([], 0, 0, Yaml::DUMP_EMPTY_ARRAY_AS_SEQUENCE);
```
3.2.0
-----
* Mappings with a colon (`:`) that is not followed by a whitespace are deprecated
when the mapping key is not quoted and will lead to a `ParseException` in
Symfony 4.0 (e.g. `foo:bar` must be `foo: bar`).
* Added support for parsing PHP constants:
```php
Yaml::parse('!php/const:PHP_INT_MAX', Yaml::PARSE_CONSTANT);
```
* Support for silently ignoring duplicate mapping keys in YAML has been
deprecated and will lead to a `ParseException` in Symfony 4.0.
3.1.0
-----
* Added support to dump `stdClass` and `ArrayAccess` objects as YAML mappings
through the `Yaml::DUMP_OBJECT_AS_MAP` flag.
* Strings that are not UTF-8 encoded will be dumped as base64 encoded binary
data.
* Added support for dumping multi line strings as literal blocks.
* Added support for parsing base64 encoded binary data when they are tagged
with the `!!binary` tag.
* Added support for parsing timestamps as `\DateTime` objects:
```php
Yaml::parse('2001-12-15 21:59:43.10 -5', Yaml::PARSE_DATETIME);
```
* `\DateTime` and `\DateTimeImmutable` objects are dumped as YAML timestamps.
* Deprecated usage of `%` at the beginning of an unquoted string.
* Added support for customizing the YAML parser behavior through an optional bit field:
```php
Yaml::parse('{ "foo": "bar", "fiz": "cat" }', Yaml::PARSE_EXCEPTION_ON_INVALID_TYPE | Yaml::PARSE_OBJECT | Yaml::PARSE_OBJECT_FOR_MAP);
```
* Added support for customizing the dumped YAML string through an optional bit field:
```php
Yaml::dump(array('foo' => new A(), 'bar' => 1), 0, 0, Yaml::DUMP_EXCEPTION_ON_INVALID_TYPE | Yaml::DUMP_OBJECT);
```
3.0.0
-----
* Yaml::parse() now throws an exception when a blackslash is not escaped
in double-quoted strings
2.8.0
-----
* Deprecated usage of a colon in an unquoted mapping value
* Deprecated usage of @, \`, | and > at the beginning of an unquoted string
* When surrounding strings with double-quotes, you must now escape `\` characters. Not
escaping those characters (when surrounded by double-quotes) is deprecated.
Before:
```yml
class: "Foo\Var"
```
After:
```yml
class: "Foo\\Var"
```
2.1.0
-----
* Yaml::parse() does not evaluate loaded files as PHP files by default
anymore (call Yaml::enablePhpParsing() to get back the old behavior)