The ReflectionFunction class

    (PHP 5, PHP 7, PHP 8)

    Introduzione

    The ReflectionFunction class reports information about a function.

    Sommario della classe

    class ReflectionFunction extends ReflectionFunctionAbstract {
    /* Costanti */
    public const int IS_DEPRECATED;
    /* Proprietà ereditate */
    public string $name;
    /* Metodi */
    public function __construct(Closure|string $function)
    public static function export(string $name, string $return = ?): string
    public function getClosure(): Closure
    public function invoke(mixed ...$args): mixed
    public function invokeArgs(array $args): mixed
    public function isAnonymous(): bool
    #[\Deprecated(
        since: '8.0',
        message: "as ReflectionFunction can no longer be constructed for disabled functions",
    )]
    public function isDisabled(): bool
    public function __toString(): string
    /* Metodi ereditati */
    private function ReflectionFunctionAbstract::__clone(): void
    public function ReflectionFunctionAbstract::getAttributes(?string $name = null, int $flags = 0): array
    public function ReflectionFunctionAbstract::getClosureCalledClass(): ?ReflectionClass
    public function ReflectionFunctionAbstract::getClosureScopeClass(): ?ReflectionClass
    public function ReflectionFunctionAbstract::getClosureThis(): ?object
    public function ReflectionFunctionAbstract::getClosureUsedVariables(): array
    public function ReflectionFunctionAbstract::getDocComment(): string|false
    public function ReflectionFunctionAbstract::getEndLine(): int|false
    public function ReflectionFunctionAbstract::getExtension(): ?ReflectionExtension
    public function ReflectionFunctionAbstract::getExtensionName(): string|false
    public function ReflectionFunctionAbstract::getFileName(): string|false
    public function ReflectionFunctionAbstract::getName(): string
    public function ReflectionFunctionAbstract::getNamespaceName(): string
    public function ReflectionFunctionAbstract::getNumberOfParameters(): int
    public function ReflectionFunctionAbstract::getNumberOfRequiredParameters(): int
    public function ReflectionFunctionAbstract::getParameters(): array
    public function ReflectionFunctionAbstract::getReturnType(): ?ReflectionType
    public function ReflectionFunctionAbstract::getShortName(): string
    public function ReflectionFunctionAbstract::getStartLine(): int|false
    public function ReflectionFunctionAbstract::getStaticVariables(): array
    public function ReflectionFunctionAbstract::getTentativeReturnType(): ?ReflectionType
    public function ReflectionFunctionAbstract::hasReturnType(): bool
    public function ReflectionFunctionAbstract::hasTentativeReturnType(): bool
    public function ReflectionFunctionAbstract::inNamespace(): bool
    public function ReflectionFunctionAbstract::isClosure(): bool
    public function ReflectionFunctionAbstract::isDeprecated(): bool
    public function ReflectionFunctionAbstract::isGenerator(): bool
    public function ReflectionFunctionAbstract::isInternal(): bool
    public function ReflectionFunctionAbstract::isStatic(): bool
    public function ReflectionFunctionAbstract::isUserDefined(): bool
    public function ReflectionFunctionAbstract::isVariadic(): bool
    public function ReflectionFunctionAbstract::returnsReference(): bool
    abstract public function ReflectionFunctionAbstract::__toString(): void
    }

    Costanti predefinite

    ReflectionFunction Modifiers

    ReflectionFunction::IS_DEPRECATED int

    Indicates deprecated functions.

    Log delle modifiche

    Versione Descrizione
    8.4.0 The class constants are now typed.
    8.0.0 ReflectionFunction::export() was removed.

    Indice dei contenuti

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    User Contributed Notes 2 notes

    up
    9
    a dot lucassilvadeoliveira at gmail dot com
    5 years ago
    We can use this functionality to automatically pass arguments to our function based on some data structure.

NOTE: I am using a php 8.0> feature called "Nameds parameter"

<?php

$valuesToProcess = [
  'name' => 'Anderson Lucas Silva de Oliveira',
  'age' => 21,
  'hobbie' => 'Play games'
];

function processUserData($name, $age, $job = "", $hobbie = "")
{
    $msg = "Hello $name. You have $age years old";
    if (!empty($job)) {
    $msg .= ". Your job is $job";
    }

    if (!empty($hobbie)) {
        $msg .= ". Your hobbie is $hobbie";
    }

    echo $msg . ".";
}

$refFunction = new ReflectionFunction('processUserData');
$parameters = $refFunction->getParameters();

$validParameters = [];
foreach ($parameters as $parameter) {
    if (!array_key_exists($parameter->getName(), $valuesToProcess) && !$parameter->isOptional()) {
        throw new DomainException('Cannot resolve the parameter' . $parameter->getName());
    }

    if(!array_key_exists($parameter->getName(), $valuesToProcess)) {
        continue;
    }

    $validParameters[$parameter->getName()] =