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ReflectionFunctionAbstract::getReturnType

(PHP 7)

ReflectionFunctionAbstract::getReturnTypeGets the specified return type of a function

説明

public ReflectionFunctionAbstract::getReturnType ( void ) : ReflectionType

Gets the specified return type of a reflected function.

パラメータ

この関数にはパラメータはありません。

返り値

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

例1 ReflectionFunctionAbstract::getReturnType() example

<?php

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

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

上の例の出力は以下となります。

int

例2 Usage on built-in functions

<?php

$reflection2 
= new ReflectionFunction('array_merge');

var_dump($reflection2->getReturnType());

上の例の出力は以下となります。

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.

参考

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