Asserts for a condition

Gets a unique number associated with a given object

Get an array of keys for the given array

Checks if an object has a given member

Checks whether an array has a specific element identified by its index or key

Sorts an array by its keys (if any)

Gets the link count for an object or array

Serializes an object into a XML file

Sets the value of a property or a data member of an object by its name

Gets the variable links count

Unserializes an object from a XML file