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ReflectionParameter::getDefaultValue

(PHP 5 >= 5.0.3, PHP 7, PHP 8)

ReflectionParameter::getDefaultValue — Gets default parameter value

Beschreibung

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.

Parameter-Liste

Diese Funktion besitzt keine Parameter.

Rückgabewerte

The parameters default value.

Changelog

Version Beschreibung
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.

Beispiele

Beispiel #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;
}
?>

Das oben gezeigte Beispiel erzeugt folgende Ausgabe:

Name: test

Name: bar
Default value: baz

Siehe auch