International PHP Conference 2015

ReflectionFunctionAbstract::getNumberOfRequiredParameters

(PHP 5 >= 5.0.3)

ReflectionFunctionAbstract::getNumberOfRequiredParametersGets number of required parameters

Descrierea

public int ReflectionFunctionAbstract::getNumberOfRequiredParameters ( void )

Get the number of required parameters that a function defines.

Avertizare

Această funcție nu este documentată în prezent; este disponibilă numai lista sa de argumente.

Parametri

Această funcție nu are parametri.

Valorile întoarse

The number of required parameters.

A se vedea și

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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
1 month 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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