PHP 8.4.0 RC2 available for testing

ReflectionFunctionAbstract::getNumberOfRequiredParameters

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

ReflectionFunctionAbstract::getNumberOfRequiredParameters必須パラメータの数を取得する

説明

public ReflectionFunctionAbstract::getNumberOfRequiredParameters(): int

関数で定義されている必須パラメータの数を取得します。

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

必須パラメータの数を返します。

参考

add a note

User Contributed Notes 2 notes

up
8
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

?>
up
5
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
To Top