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ReflectionParameter::getDefaultValueConstantName

(PHP 5 >= 5.4.6, PHP 7, PHP 8)

ReflectionParameter::getDefaultValueConstantNameReturns the default value's constant name if default value is constant or null

Beschreibung

public ReflectionParameter::getDefaultValueConstantName(): ?string

Returns the default value's constant name of the parameter of any user-defined or internal function or method, if default value is constant or null. If the parameter is not optional a ReflectionException will be thrown.

Parameter-Liste

Diese Funktion besitzt keine Parameter.

Rückgabewerte

Returns string on success or null on failure.

Changelog

Version Beschreibung
8.0.0 This method now allows getting the default values' constant names of built-in functions and built-in class methods. Previously, a ReflectionException was thrown.

Beispiele

Beispiel #1 Getting default values' constant names of function parameters

<?php
function foo($test$bar PHP_INT_MIN)
{
    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->getDefaultValueConstantName() . PHP_EOL;
    }
    echo 
PHP_EOL;
}
?>

Das oben gezeigte Beispiel erzeugt folgende Ausgabe:

Name: test

Name: bar
Default value: PHP_INT_MIN

Siehe auch

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