PHP 7.0.0 Beta 2 Released

ReflectionFunctionAbstract::getNumberOfRequiredParameters

(PHP 5 >= 5.0.3)

ReflectionFunctionAbstract::getNumberOfRequiredParametersGets number of required parameters

Beschreibung

public int ReflectionFunctionAbstract::getNumberOfRequiredParameters ( void )

Get the number of required parameters that a function defines.

Warnung

Diese Funktion ist bis jetzt nicht dokumentiert. Es steht nur die Liste der Argumente zur Verf├╝gung.

Parameter-Liste

Diese Funktion hat keine Parameter.

R├╝ckgabewerte

The number of required parameters.

Siehe auch

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User Contributed Notes 2 notes

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2
sebastian at sebastian-eiweleit dot de
1 year 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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1
cesar at magic3w dot com
23 days 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

?>
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