spl_autoload_register
[callable|null$callback = null],
[bool$throw = true],
[bool$prepend = false]
): bool
Register a function with the spl provided __autoload queue. If the queue is not yet activated it will be activated.
If your code has an existing __autoload function then this function must be explicitly registered on the __autoload queue. This is because spl_autoload_register will effectively replace the engine cache for the __autoload function by either spl_autoload or spl_autoload_call.
If there must be multiple autoload functions, spl_autoload_register allows for this. It effectively creates a queue of autoload functions, and runs through each of them in the order they are defined. By contrast, __autoload may only be defined once.
Parameters
- callback
-
The autoload function being registered. If null, then the default implementation of spl_autoload will be registered.
callback( string$class_name ): void - 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.
Return Values
Returns true on success or false on failure.
Changelog
| Version | Description |
| 8.0.0 | callback is now nullable. |