PHP Conference Nagoya 2025

    ReflectionFunctionAbstract::getParameters

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

    ReflectionFunctionAbstract::getParameters — パラメータを取得する

    説明

    public ReflectionFunctionAbstract::getParameters(): array

    パラメータをソースコードで定義された順に ReflectionParameter の配列で取得します。

    パラメータ

    この関数にはパラメータはありません。

    戻り値

    パラメータを ReflectionParameter オブジェクトの配列で返します。

    参考

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    User Contributed Notes 2 notes

    up
    9
    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
    up
    4
    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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