PHP Manual»Reflection»ReflectionParameter

The ReflectionParameter class

(PHP 5, PHP 7, PHP 8)

The ReflectionParameter class retrieves information about function's or method's parameters.

To introspect function parameters, first create an instance of the ReflectionFunction or ReflectionMethod classes and then use their ReflectionFunctionAbstract::getParameters() method to retrieve an array of parameters.

class ReflectionParameter implements Reflector {

/* Properties */

public string $name;

/* Methods */

public function __construct(string|array|object $function, int|string $param)

public function allowsNull(): bool

public function canBePassedByValue(): bool

private function __clone(): void

public static function export(string $function, string $parameter, bool $return = ?): string

public function getAttributes(?string $name = null, int $flags = 0): array

#[\Deprecated(
since: '8.0',
message: "use ReflectionParameter::getType() instead",
)]
public function getClass(): ?ReflectionClass

public function getDeclaringClass(): ?ReflectionClass

public function getDeclaringFunction(): ReflectionFunctionAbstract

public function getDefaultValue(): mixed

public function getDefaultValueConstantName(): ?string

public function getName(): string

public function getPosition(): int

public function getType(): ?ReflectionType

public function hasType(): bool

#[\Deprecated(
since: '8.0',
message: "use ReflectionParameter::getType() instead",
)]
public function isArray(): bool

#[\Deprecated(
since: '8.0',
message: "use ReflectionParameter::getType() instead",
)]
public function isCallable(): bool

public function isDefaultValueAvailable(): bool

public function isDefaultValueConstant(): bool

public function isOptional(): bool

public function isPassedByReference(): bool

public function isPromoted(): bool

public function isVariadic(): bool

public function __toString(): string

}

name: Name of the parameter. Read-only, throws ReflectionException in attempt to write.

Version	Description
8.0.0	ReflectionParameter::export() was removed.

ReflectionParameter::allowsNull — Checks if null is allowed
ReflectionParameter::canBePassedByValue — Returns whether this parameter can be passed by value
ReflectionParameter::__clone — Clone
ReflectionParameter::__construct — Construct
ReflectionParameter::export — Exports
ReflectionParameter::getAttributes — Gets Attributes
ReflectionParameter::getClass — Get a ReflectionClass object for the parameter being reflected or null
ReflectionParameter::getDeclaringClass — Gets declaring class
ReflectionParameter::getDeclaringFunction — Gets declaring function
ReflectionParameter::getDefaultValue — Gets default parameter value
ReflectionParameter::getDefaultValueConstantName — Returns the default value's constant name if default value is constant or null
ReflectionParameter::getName — Gets parameter name
ReflectionParameter::getPosition — Gets parameter position
ReflectionParameter::getType — Gets a parameter's type
ReflectionParameter::hasType — Checks if parameter has a type
ReflectionParameter::isArray — Checks if parameter expects an array
ReflectionParameter::isCallable — Returns whether parameter MUST be callable
ReflectionParameter::isDefaultValueAvailable — Checks if a default value is available
ReflectionParameter::isDefaultValueConstant — Returns whether the default value of this parameter is a constant
ReflectionParameter::isOptional — Checks if optional
ReflectionParameter::isPassedByReference — Checks if passed by reference
ReflectionParameter::isPromoted — Checks if a parameter is promoted to a property
ReflectionParameter::isVariadic — Checks if the parameter is variadic
ReflectionParameter::__toString — To string

The ReflectionParameter class

Table of Contents