spl_autoload_register()

spl_autoload_register() — Register given function as __autoload() implementation.

spl_autoload_register() — Register a function with the spl provided __autoload queue. If the queue is not yet activated it will be activated.

If your code has an existing __autoload function then this function must be explicitly registered on the __autoload queue. This is because spl_autoload_register will effectively replace the engine cache for the __autoload function by either spl_autoload or spl_autoload_call.

If there must be multiple autoload functions, spl_autoload_register allows for this. It effectively creates a queue of autoload functions, and runs through each of them in the order they are defined. By contrast, __autoload may only be defined once.

Inputs: callback: The autoload function being registered. If null, then the default implementation of spl_autoload will be registered. The class will not contain the leading backslash of a fully-qualified identifier. throw: This parameter specifies whether spl_autoload_register should throw exceptions when the callback cannot be registered. prepend: If true, spl_autoload_register will prepend the autoloader on the autoload queue instead of appending it.

Returns: Returns true on success or false on failure.