ReflectionFunctionAbstract::getParameters

(PHP 5 >= 5.2.0, PHP 7, PHP 8)

ReflectionFunctionAbstract::getParameters — Récupère les paramètres

Description

public ReflectionFunctionAbstract::getParameters(): array

Récupère les paramètres, sous la forme d'un tableau d'objets ReflectionParameter, dans l'ordre dans laquelle ils sont définis dans la source.

Liste de paramètres

Cette fonction ne contient aucun paramètre.

Valeurs de retour

Les paramètres, sous la forme d'objets ReflectionParameter.

Voir aussi

ReflectionFunctionAbstract::getNumberOfParameters() - Récupère le nombre de paramètres
func_get_args() - Retourne les arguments d'une fonction sous la forme d'un tableau

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User Contributed Notes 2 notes

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dabidi at slupca dot pl ¶

9 years ago


This is part of my private framework that uses reflection. 
This function get arguments list from theme method and puts corresponding vars from $_REQUEST ($_GET, $_POST, and $_COOKIE)

<?php
public static function fire_theme_method($class, $method)
{
        $fire_args=array();
        
        $reflection = new ReflectionMethod($class, $method);

    foreach($reflection->getParameters() AS $arg)
    {
        if($_REQUEST[$arg->name])
        $fire_args[$arg->name]=$_REQUEST[$arg->name];
        else
        $fire_args[$arg->name]=null;
    }
        
    return call_user_func_array(array($class, $method), $fire_args);
}
?>
For example, if my theme method needs only id, and we get this url:
http://example.com/my_class/my_method/?id=12&some_unwanted_var=123
will be ignored some_unwanted_var

Of course behind this i have .htaccess, autoloader and controller

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a dot lucassilvadeoliveira at gmail dot com ¶

4 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()] = $valuesToProcess[$parameter->getName()];
}

$refFunction->invoke(...$validParameters);
?>

Results in:

Hello Anderson Lucas Silva de Oliveira. You have 21 years old. Your hobbie is Play games.

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