ReflectionParameter::getDefaultValue

(PHP 5 >= 5.0.3, PHP 7)

ReflectionParameter::getDefaultValueGets default parameter value

설명

public mixed ReflectionParameter::getDefaultValue ( void )

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

인수

이 함수는 인수가 없습니다.

반환값

The parameters default value.

예제

Example #1 Getting

<?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;
}
?>

위 예제의 출력:

Name: test

Name: bar
Default value: baz

주의

Note:

Due to implementation details, it is not possible to get the default value of built-in functions or methods of built-in classes. Trying to do this will result a ReflectionException being thrown.

참고

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User Contributed Notes 1 note

up
3
gmail@asmqb7
5 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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