ReflectionFunctionAbstract::getNumberOfRequiredParameters

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

ReflectionFunctionAbstract::getNumberOfRequiredParameters — Gets number of required parameters

Descrizione

public ReflectionFunctionAbstract::getNumberOfRequiredParameters(): int

Get the number of required parameters that a function defines.

Elenco dei parametri

Questa funzione non contiene parametri.

Valori restituiti

The number of required parameters.

Vedere anche:

ReflectionFunctionAbstract::getNumberOfParameters() - Gets number of parameters

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User Contributed Notes 2 notes

down

cesar at magic3w dot com ¶

9 years ago

It's interesting to note that this function will treat optional parameters that come before a required parameter as required too. This is good since it allows you to verify that the function will be receiving enough parameters for the it to work, regardless where they are located.

<?php

class MyTest() {
    public function test($a = null, $b) {}
    public function test2($a = null, $b, $c = null) {}
}

//Create the reflection
$r  = new \ReflectionMethod('MyTest', 'test');
$r2 = new \ReflectionMethod('MyTest', 'test2');

//Verify the numbers
echo 'Test: ' . $r->getNumberOfRequiredParameters()); //Output: 2
echo 'Test2: ' . $r->getNumberOfRequiredParameters()); //Output: 2

?>

down

sebastian at sebastian-eiweleit dot de ¶

11 years ago

<?php
namespace ExampleWorld;
// The Class
class helloWorld {
    /* Method with two required arguments */

    public function requiredTwoArguments ( $var1, $var2 ) {
        // Some code ...
    }

    /* Method with two arguments, but just one is required */
    public function requiredOneArgument ( $var1, $var2 = false ) {
        // Some code ...
    }
}

$r = new \ReflectionMethod ( 'ExampleWorld\helloWorld', 'requiredTwoArguments' );
echo $r->getNumberOfRequiredParameters ();

$r = new \ReflectionMethod ( 'ExampleWorld\helloWorld', 'requiredOneArgument' );
echo $r->getNumberOfRequiredParameters ();

// Output: 2 1

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