ReflectionType::allowsNull
(PHP 7, PHP 8)
ReflectionType::allowsNull — Checks if null is allowed
Description
public ReflectionType::allowsNull(): bool
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() - Checks if it is a built-in type
- ReflectionType::__toString() - To string
- ReflectionParameter::getType() - Gets a parameter's type
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https://www.php.net/manual/en/reflectiontype.allowsnull.php
