PHP Australia Conference 2015

ReflectionParameter::isDefaultValueAvailable

(PHP 5 >= 5.0.3)

ReflectionParameter::isDefaultValueAvailableComprueba si el valor por omisión está disponible

Descripción

public bool ReflectionParameter::isDefaultValueAvailable ( void )

Comprueba si el valor por omisión para el parámetrp está disponible.

Parámetros

Esta función no tiene parámetros.

Valores devueltos

TRUE si el valor por omisión está disponible, en caso contrario FALSE

Ver también

add a note add a note

User Contributed Notes 1 note

up
0
php at marcyes dot com
3 years ago
A quick gotcha that I wasn't aware of, suppose you have a function definition like this:

<?php
function foo(array $bar = array('baz' => ''),$che){}
?>

And you want to check if $bar has a default value:

<?php
$rfunc
= new ReflectionFunction('foo');
$rparams = $rfunc->getParams();

echo
$rparams[0]->isDefaultValueAvailable() ? 'TRUE' : 'FALSE';
?>

That will echo 'FALSE' because $che has no default value so $bar becomes required and the Reflection interface no long sees $bar's default value of array('baz' => '').

The solution is to give $che a default value also:

<?php
function foo(array $bar = array('baz' => ''),$che = null){}
?>

And then $bar's default value will be visible again.

While I understand why it does this, I still wish there was a way to get the default value without resorting to giving all params after it a default value also.
To Top