ReflectionFunctionAbstract::hasReturnType
(PHP 7)
ReflectionFunctionAbstract::hasReturnType — Checks if the function has a specified return type
설명
public bool ReflectionFunctionAbstract::hasReturnType
( void
)
Checks whether the reflected function has a return type specified.
인수
이 함수는 인수가 없습니다.
반환값
Returns TRUE if the function is a specified return type, otherwise FALSE.
예제
Example #1 ReflectionFunctionAbstract::hasReturnType() example
<?php
function to_int($param) : int {
return (int) $param;
}
$reflection1 = new ReflectionFunction('to_int');
var_dump($reflection1->hasReturnType());
위 예제의 출력:
bool(true)
Example #2 Usage on built-in functions
<?php
$reflection2 = new ReflectionFunction('array_merge');
var_dump($reflection2->hasReturnType());
위 예제의 출력:
bool(false)
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.
add a note
User Contributed Notes
There are no user contributed notes for this page.
