ReflectionType
PHP Manual

ReflectionType::allowsNull

Checks if null is allowed

Description

public bool ReflectionType::allowsNull()

Checks whether the parameter allows null.

Parameters

This function has no parameters.

Return Values

true if null is allowed, otherwise false

Examples

Example #1 ReflectionType::allowsNull example

<?php
function someFunction(string $param, stdClass $param2 = null) {}

$reflectionFunc = new ReflectionFunction('someFunction');
$reflectionParams = $reflectionFunc->getParameters();

var_dump($reflectionParams[0]->getType()->allowsNull());
var_dump($reflectionParams[1]->getType()->allowsNull());

The above example will output:

bool(false)
bool(true)

See Also

  • ReflectionNamedType::isBuiltin
  • ReflectionType::__toString
  • ReflectionParameter::getType