YAML does not specify an absolute indentation level, but a consistent indentation of nested nodes only: http://www.yaml.org/spec/1.2/spec.html#space/indentation/
Projects that are generally using 2 spaces for indentation should be able to retain consistency with their coding standards by supplying a custom value for the new $indent parameter added to Yaml::dump(), or the new Dumper::setIndentation() method.
The new parameter is a backwards-compatible API addition and defaults to the previous default of 4 (which was changed from 2 via PR #2242 only recently).
Conflicts:
src/Symfony/Component/Yaml/Dumper.php
src/Symfony/Component/Yaml/Yaml.php
By default, object support is disabled, and instead of throwing an
exception when an object is handled, null is returned.
If you do need object support, enable it via:
Yaml::dump($data, false, true);
If you want an exception to be thrown in case an invalid type is handled
(a PHP resource or a PHP object), pass true as the second argument:
Yaml::dump($data, true, true);
The same can be done when parsing:
Yaml::parse($data, 2, false, true);
