ReflectionParameter::getDefaultValue

(PHP 5 >= 5.0.3, PHP 7)

ReflectionParameter::getDefaultValue — Gets 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

ReflectionParameter::isOptional() - Checks if optional
ReflectionParameter::isPassedByReference() - Checks if passed by reference

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User Contributed Notes 1 note

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gmail@asmqb7 ¶

8 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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