ReflectionFunctionAbstract::getReturnType
(PHP 7)
ReflectionFunctionAbstract::getReturnType — Gets the specified return type of a function
Descrierea
Gets the specified return type of a reflected function.
Parametri
Această funcție nu are parametri.
Valorile întoarse
Returns a ReflectionType object if a return type is
specified, null otherwise.
Exemple
Example #1 ReflectionFunctionAbstract::getReturnType() example
<?php
function to_int($param) : int {
return (int) $param;
}
$reflection1 = new ReflectionFunction('to_int');
echo $reflection1->getReturnType();
Exemplul de mai sus va afișa:
int
Example #2 Usage on built-in functions
<?php
$reflection2 = new ReflectionFunction('array_merge');
var_dump($reflection2->getReturnType());
Exemplul de mai sus va afișa:
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.
A se vedea și
- ReflectionFunctionAbstract::hasReturnType() - Checks if the function has a specified return type
- ReflectionType::__toString() - To string
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