The class instance constructor. The default value for $data is an empty array.

The $data parameter is the initial array.

Get a config value. The default value for $default is null. The default value for $setIfDefault is false.

If the multi-part key $key does exist, and $setIfDefault is true then the default value will be save in the config object. On the next call, it's the value of $default that will be returned.

Return all loaded value of the config. (can be useful for caching purpose).

Add a configuration directory path add the end of the group. The Default value for $group is "__main__"

Add a configuration directory path add the beginning of the group. The Default value for $group is "__main__"

Define where the group must be positioned relatively to other group. The default value for $before is null. The default value for $after is null.

For more details read documentation OrderedGroup->setGroupPosition()

Add a reader at the end of the list of readers to use.

Add a reader at the beginning of the list of readers to use.

Add a key callback at the end at the key callback list.

For more information about key callback, read the chapter about callback of the document.

Add a key callback at the beginning at the key callback list.

For more information about key callback, read the chapter about callback of the document.

Add a value callback at the end at the value callback list.

For more information about value callback, read the chapter about callback of the document.

Add a value callback at the beginning at the value callback list.

For more information about value callback, read the chapter about callback of the document.

You can define one (or more) callback that can modify a key before been read by the Config object.

The function have one parameter: the initial key. The function must return a string that will be the new key.

You can define one (or more) callback that can modify a key after it's read from config and before it's send back to your application.

The function have two parameters:

1. the initial key
2. The read value

The function must return a value that will be the new value.

The class implement two interfaces:

• \IteratorAggregate, for foreach use. (read-only)
• \Countable, to get the number of configurations