PHPWales 2020 - June 3rd to June 4th

ReflectionFunctionAbstract::getReturnType

(PHP 7)

ReflectionFunctionAbstract::getReturnTypeGets the specified return type of a function

Descrição

public ReflectionFunctionAbstract::getReturnType ( void ) : ReflectionType

Gets the specified return type of a reflected function.

Parâmetros

Esta função não possui parâmetros.

Valor Retornado

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

Exemplos

Exemplo #1 ReflectionFunctionAbstract::getReturnType() example

<?php

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

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

O exemplo acima irá imprimir:

int

Exemplo #2 Usage on built-in functions

<?php

$reflection2 
= new ReflectionFunction('array_merge');

var_dump($reflection2->getReturnType());

O exemplo acima irá imprimir:

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.

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