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ReflectionParameter::getDefaultValue

(PHP 5 >= 5.0.3, PHP 7)

ReflectionParameter::getDefaultValueGets default parameter value

Descrierea

public ReflectionParameter::getDefaultValue ( ) : mixed

Gets the default value of the parameter for any user-defined or internal function or method. If the parameter is not optional a ReflectionException will be thrown.

Parametri

Această funcție nu are parametri.

Valorile întoarse

The parameters default value.

Istoricul schimbărilor

Versiune Descriere
8.0.0 This method now allows getting the default value of parameters of built-in functions and built-in class methods. Previously, a ReflectionException was thrown.

Exemple

Example #1 Getting default values of function parameters

<?php
function foo($test$bar 'baz')
{
    echo 
$test $bar;
}

$function = new ReflectionFunction('foo');

foreach (
$function->getParameters() as $param) {
    echo 
'Name: ' $param->getName() . PHP_EOL;
    if (
$param->isOptional()) {
        echo 
'Default value: ' $param->getDefaultValue() . PHP_EOL;
    }
    echo 
PHP_EOL;
}
?>

Exemplul de mai sus va afișa:

Name: test

Name: bar
Default value: baz

A se vedea și

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User Contributed Notes 1 note

up
3
gmail@asmqb7
4 years ago
[Editor's note: fixed on user's request]

Getting `Uncaught ReflectionException: Internal error: Failed to retrieve the default value`?

You have to wrap this inside ->isDefaultValueAvailable().
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