Defer

This class MUST be used to manage deferred callbacks that SHALL be executed at the end of a scope.

It provides mechanisms to register, execute, and report errors for callbacks in a LIFO order.

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• Full name: \FastForward\Defer\Defer
• This class is marked as final and can't be subclassed
• This class implements: \FastForward\Defer\DeferInterface
• This class is a Final class

Methods

__construct

Constructs a new Defer instance and optionally registers an initial callback.

public __construct(callable|null $callback = null, mixed $arguments): mixed

Parameters:

Parameter	Type	Description
$callback	callable|null	the initial callback to register (optional)
$arguments	mixed	Arguments for the callback.

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__destruct

Executes all registered callbacks when the object is destroyed.

public __destruct(): mixed

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__invoke

Registers a callback to be executed later.

public __invoke(callable $callback, mixed $arguments): void

This method MUST add the callback to the stack. It MAY be called multiple times.

Parameters:

Parameter	Type	Description
$callback	callable	the callback to register
$arguments	mixed	Arguments for the callback.

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count

Returns the number of registered callbacks.

public count(): int

Return Value:

the number of callbacks

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defer

Registers a callback to be executed later.

public defer(callable $callback, mixed $args): void

This method MUST add the callback to the stack. It MAY be called multiple times.

Parameters:

Parameter	Type	Description
$callback	callable	the callback to register
$args	mixed	Arguments for the callback.

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isEmpty

Determines if there are no registered callbacks.

public isEmpty(): bool

Return Value:

true if no callbacks are registered; otherwise, false

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setErrorReporter

Sets the global error reporter for all Defer instances.

public static setErrorReporter(\FastForward\Defer\ErrorReporterInterface|null $reporter): void

• This method is static. Parameters:

Parameter	Type	Description
$reporter	\FastForward\Defer\ErrorReporterInterface|null	the error reporter to use

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