ReflectionProperty::hasDefaultValue

(PHP 8)

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

Descrição

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).

Parâmetros

Esta função não possui parâmetros.

Valor Retornado

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.

Exemplos

Exemplo #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
?>

O exemplo acima produzirá:

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

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

Veja Também

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

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