ReflectionFunctionAbstract::getParameters

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

ReflectionFunctionAbstract::getParameters — Obtiene los parámetros

Descripción

public ReflectionFunctionAbstract::getParameters(): array

Obtiene los parámetros, en forma de un array de objetos ReflectionParameter, en el orden en que están definidos en el código fuente.

Parámetros

Esta función no tiene parámetros.

Valores devueltos

Los parámetros, en forma de objetos ReflectionParameter.

Ver también

ReflectionFunctionAbstract::getNumberOfParameters() - Obtiene el número de argumentos
func_get_args() - Devuelve los argumentos de una función en forma de array

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User Contributed Notes 2 notes

down

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

down

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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