When writing PHP applications, you may need to forward a static method call in late-static-binding context using an argument array. This is useful in everyday tasks such as working with imported data, application settings, user-facing lists, and reports.
The forward_static_call_array() operation provides this behavior directly. The examples below show what happens to the inputs and what to check before using the result in your application.
What Is forward_static_call_array() in PHP?
Forward a static method call in late-static-binding context using an argument array.
Its syntax is:
forward_static_call_array(callable $callback, array $args): mixed
Parameters used by this operation:
$callback— A callable that controls the comparison or transformation; callbacks should follow the expected return contract.$args— The value supplied for this argument affects the operation.
Must be called in a class method context and is tied to late static binding. Do not substitute it for arbitrary runtime function dispatch.
Example 1: Basic Usage
Start with a small, self-contained input so you can inspect exactly how the operation behaves.
<?php
class BaseLabel { public static function label(string $value): string { return static::class . ": " . $value; } }
class ChildLabel extends BaseLabel {}
class DispatchLabel extends ChildLabel { public static function run(): string { return forward_static_call_array([parent::class, "label"], ["ready"]); } }
echo DispatchLabel::run();
Output:
DispatchLabel: ready
The output shows the result of the first call. Check the printed keys and values as well as their order.
Example 2: Another Important Case
This variation highlights another input shape, a comparison option, or a change in the collection.
<?php
class ParentFormatter { public static function format(string $value): string { return static::class . "-" . $value; } }
class SpecialFormatter extends ParentFormatter { public static function demo(): string { return forward_static_call_array([parent::class, "format"], ["ok"]); } }
echo SpecialFormatter::demo();
Output:
SpecialFormatter-ok
Compare this result with Example 1: the difference comes from the input or option selected, not from additional processing.
Practical Example: Forward arguments from inherited static factory and helper methods
Forward arguments from inherited static factory and helper methods. Save the code in a PHP file and adapt the sample data to your project.
<?php
class MessageBase { public static function identify(string $code): string { return static::class . ": " . $code; } }
class MessageChild extends MessageBase { public static function dispatch(): string { return forward_static_call_array([parent::class, "identify"], ["A-101"]); } }
echo MessageChild::dispatch();
Output:
MessageChild: A-101
The output comes from the completed workflow shown above. When adapting it, change the source records and keep the same checks for missing, unexpected, or invalid values.
Important Behavior and Edge Cases
Must be called in a class method context and is tied to late static binding. Do not substitute it for arbitrary runtime function dispatch.
- Test the operation with empty or missing input and decide how your application should respond.
- Read the return value independently from any changes to variables passed by reference.
- Validate untrusted input before using the result for permissions, database changes, or user-visible output.
Comparison With Related Functions
| Function or Approach | When to Use It |
|---|---|
forward_static_call_array() | Forward a static method call in late-static-binding context using an argument array |
| Related functions | call_user_func_array() performs general calls; forward_static_call() passes arguments separately. |
Common Beginner Mistakes
| Mistake | Correct Approach |
|---|---|
| Assuming the example covers every input type | Must be called in a class method context and is tied to late static binding. Do not substitute it for arbitrary runtime function dispatch. |
| Confusing the method with a similar operation | call_user_func_array() performs general calls; forward_static_call() passes arguments separately. |
| Ignoring a failed or absent result | Check return values before using them in subsequent operations. |
Key Takeaways
forward_static_call_array()helps you forward a static method call in late-static-binding context using an argument array.- Must be called in a class method context and is tied to late static binding. Do not substitute it for arbitrary runtime function dispatch.
- call_user_func_array() performs general calls; forward_static_call() passes arguments separately.
- Use the practical example as a starting point, but validate real application inputs.
forward_static_call_array() is useful when you need to forward a static method call in late-static-binding context using an argument array. Use its documented rules and the examples above to choose the right behavior for your data.