ReflectionProperty::hasDefaultValue

(PHP 8)

ReflectionProperty::hasDefaultValue — Checks if property has a default value declared

Descrizione

public ReflectionProperty::hasDefaultValue(): bool

Checks whether the property was declared with a default value, including an implicit null default value. Only returns false for typed properties without default value (or dynamic properties).

Elenco dei parametri

Questa funzione non contiene parametri.

Valori restituiti

If the property has any default value (including null) true is returned; if the property is typed without a default value declared or is a dynamic property, false is returned.

Esempi

Example #1 ReflectionProperty::hasDefaultValue() example

<?php
class Foo {
    public $bar;
    public ?int $baz;
    public ?int $foo = null;
    public int $boing;
    
    public function __construct()
    {
        $this->ping = '';
    }
}

$ro = new ReflectionObject(new Foo());
var_dump($ro->getProperty('bar')->hasDefaultValue());
var_dump($ro->getProperty('baz')->hasDefaultValue());
var_dump($ro->getProperty('foo')->hasDefaultValue());
var_dump($ro->getProperty('boing')->hasDefaultValue());
var_dump($ro->getProperty('ping')->hasDefaultValue()); // Dynamic property
var_dump($ro->getProperty('pong')->hasDefaultValue()); // Not defined property
?>

Il precedente esempio visualizzerà:

bool(true)
bool(false)
bool(true)
bool(false)
bool(false)

Fatal error: Uncaught ReflectionException: Property Foo::$pong does not exist in example.php

Vedere anche:

ReflectionProperty::getDefaultValue() - Returns the default value declared for a property

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