(PHP 8)
ReflectionProperty::getDefaultValue — Returns the default value declared for a property
public ReflectionProperty::getDefaultValue ( ) : mixed
Gets the implicit or explicitly declared default value for a property.
This function has no parameters.
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 ReflectionClass::hasDefaultValue() to detect the difference.
Example #1 ReflectionClass::getDefaultValue() example
<?php
class Foo {
public $bar = 1;
public ?int $baz;
public int $boing = 0;
}
$ro = new ReflectionClass(Foo::class);
var_dump($ro->getProperty('bar')->getDefaultValue());
var_dump($ro->getProperty('baz')->getDefaultValue());
var_dump($ro->getProperty('boing')->getDefaultValue());
?> The above example will output:
int(1) NULL int(0)
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https://www.php.net/manual/en/reflectionproperty.getdefaultvalue.php