PHP VERSION: 8.2.18
function_return_types_valid.php
<?php
// Overriding a method that did not have a return type:
class Test
{
public function getDateTime(string $time = NULL)
{
if ($time) {
return new DateTime($time);
}
return NULL;
}
}
class Special extends Test
{
public function getDateTime(string $time = NULL): DateTime
{
return parent::getDateTime($time);
}
}
$test = new Test();
$special = new Special();
// returns DateTime
var_dump($test->getDateTime('2015-09-01'));
// returns NULL
var_dump($test->getDateTime());
// returns DateTime
var_dump($special->getDateTime('2015-09-01'));
// generates error
try {
var_dump($special->getDateTime());
} catch (Error $e) {
echo 'ERROR: ' . $e->getMessage();
}
Output
object(DateTime)#3 (3) {
["date"]=>
string(26) "2015-09-01 00:00:00.000000"
["timezone_type"]=>
int(3)
["timezone"]=>
string(16) "America/New_York"
}
NULL
object(DateTime)#3 (3) {
["date"]=>
string(26) "2015-09-01 00:00:00.000000"
["timezone_type"]=>
int(3)
["timezone"]=>
string(16) "America/New_York"
}
ERROR: Special::getDateTime(): Return value must be of type DateTime, null returnedSOURCE CODE