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

Descrizione

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.

Elenco dei parametri

Questa funzione non contiene parametri.

Valori restituiti

Returns string on success or null on failure.

Log delle modifiche

Versione Descrizione
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.

Esempi

Example #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;
}
?>

Il precedente esempio visualizzerĂ :

Name: test

Name: bar
Default value: PHP_INT_MIN

Vedere anche:

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