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    ReflectionFunctionAbstract::getParameters

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

    ReflectionFunctionAbstract::getParameters — 获取参数

    说明

    public ReflectionFunctionAbstract::getParameters(): array

    获取通过 ReflectionParameter 数组返回参数列表。顺序为源码中定义的顺序。

    参数

    此函数没有参数。

    返回值

    由 ReflectionParameter 对象组成的参数列表。

    参见

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    User Contributed Notes 2 notes

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    8
    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
    1
    a dot lucassilvadeoliveira at gmail dot com
    3 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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