Php/docs/reflectiontype.allowsnull
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ReflectionType::allowsNull
(PHP 7)
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
Example #1 ReflectionType::allowsNull() example
<?phpfunction 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
- ReflectionType::isBuiltin() - Checks if it is a built-in type
- ReflectionType::__toString() - To string
- ReflectionParameter::getType() - Gets a parameter's type