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    ReflectionFunctionAbstract::getNumberOfParameters

    (PHP 5 >= 5.3.0, PHP 7, PHP 8)

    ReflectionFunctionAbstract::getNumberOfParameters — パラメータ数を取得する

    説明

    public ReflectionFunctionAbstract::getNumberOfParameters(): int

    関数で定義されているパラメータの数を、必須と任意の両方を含めて取得します。

    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

    パラメータの数を返します。

    参考

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    User Contributed Notes 2 notes

    up
    5
    Robert Pitt ( LitePHP )
    14 years ago
    Working on a new MVC Application Framework i use this method to check how many arguments are required before calling the sub method!

    Example

    <?php
    $this    ->method_args_count = $this->CReflection
    ->getMethod($Route->getMethod())
    ->    getNumberOfParameters();
    //Maybe be 5 but if uri is /controller/method/single_param/ we only of 1
    $this->params = $Route->getParams(); //0 in some cases

    if($this->method_args_count > count($this->params))
    {
    $this->difference = ($this->method_args_count - count($this->params));
    for(    $i=0;$i<=$this->difference;$i++)
    {
    $this->params[] = false;
    }
    }

    //Call the method with correct amount of params
    // but as false for params that have not been passed!
    call_user_func_array(array(new $this->obj,$Route->getMethod()),$this->params);
    ?>
    up
    -2
    8ctopus
    4 years ago
    $reflection = new ReflectionFunction('implode');
    echo $reflection->getNumberOfParameters();
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