ReflectionType::allowsNull
(PHP 7, PHP 8)
ReflectionType::allowsNull — Checks if null is allowed
说明
public ReflectionType::allowsNull(): bool
Checks whether the parameter allows null
.
参数
此函数没有参数。
返回值
true
if null
is allowed, otherwise false
范例
示例 #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());
以上例程会输出:
bool(false) bool(true)
参见
- ReflectionNamedType::isBuiltin() - 检查它是否是内置类型
- ReflectionType::__toString() - To string
- ReflectionParameter::getType() - Gets a parameter's type
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