update : 2015.11.03
php.shukuma.com

검색:
 
 
Gets the specified return type of a function
ReflectionFunctionAbstract
PHP Manual

ReflectionFunctionAbstract::getReturnType

(PHP 7)

ReflectionFunctionAbstract::getReturnType — Gets the specified return type of a function

설명

public ReflectionType ReflectionFunctionAbstract::getReturnType ( void )

Gets the specified return type of a reflected function.

인수

이 함수는 인수가 없습니다.

반환값

Returns a ReflectionType object if a return type is specified, NULL otherwise.

예제

Example #1 ReflectionFunctionAbstract::getReturnType() example

<?php

function to_int($param) : int {
    return (int) $param;
}

$reflection1 = new ReflectionFunction('to_int');
echo $reflection1->getReturnType();

위 예제의 출력:

int

Example #2 Usage on built-in functions

<?php

$reflection2 = new ReflectionFunction('array_merge');

var_dump($reflection2->getReturnType());

위 예제의 출력:

null

This is because many internal functions do not have types specified for their parameters or return values. It is therefore best to avoid using this method on built-in functions.

참고

ReflectionFunctionAbstract
PHP Manual