ReflectionProperty
PHP Manual

ReflectionProperty::getDefaultValue

Returns the default value declared for a property

Description

public mixed ReflectionProperty::getDefaultValue()

Gets the implicit or explicitly declared default value for a property.

Parameters

This function has no parameters.

Return Values

The default value if the property has any default value (including null). If there is no default value, then null is returned. It is not possible to differentiate between a null default value and an unitialized typed property. Use ReflectionProperty::hasDefaultValue to detect the difference.

Examples

Example #1 ReflectionProperty::getDefaultValue example

<?php
class Foo {
    public $bar = 1;
    public ?int $baz;
    public int $boing = 0;
    public function __construct(public string $bak = "default") { }
}

$ro = new ReflectionClass(Foo::class);
var_dump($ro->getProperty('bar')->getDefaultValue());
var_dump($ro->getProperty('baz')->getDefaultValue());
var_dump($ro->getProperty('boing')->getDefaultValue());
var_dump($ro->getProperty('bak')->getDefaultValue());
?>

The above example will output:

int(1)
NULL
int(0)
NULL

See Also

  • ReflectionProperty::hasDefaultValue