ReflectionProperty::hasDefaultValue

(PHP 8)

ReflectionProperty::hasDefaultValueChecks 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 irá imprimir:

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

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

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