ReflectionType::allowsNull

(PHP 7)

ReflectionType::allowsNull — Checks if null is allowed

说明

public ReflectionType::allowsNull ( void ) : 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

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());

以上例程的输出类似于：

bool(false)
bool(true)

参见

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