| --TEST-- | |
| Test ?? operator | |
| --FILE-- | |
| $var = 7; | |
| $var2 = NULL; | |
| $obj = new StdClass; | |
| $obj->boo = 7; | |
| $arr = [ | |
| 2 => 7, | |
| "foo" => "bar", | |
| "foobar" => NULL, | |
| "qux" => $obj, | |
| "bing" => [ | |
| "bang" | |
| ] | |
| ]; | |
| function foobar() { | |
| echo "called\n"; | |
| return ['a']; | |
| } | |
| var_dump($nonexistent_variable ?? 3); | |
| echo PHP_EOL; | |
| var_dump($var ?? 3); | |
| var_dump($var2 ?? 3); | |
| echo PHP_EOL; | |
| var_dump($obj->boo ?? 3); | |
| var_dump($obj->bing ?? 3); | |
| var_dump($arr["qux"]->boo ?? 3); | |
| var_dump($arr["qux"]->bing ?? 3); | |
| echo PHP_EOL; | |
| var_dump($arr[2] ?? 3); | |
| var_dump($arr["foo"] ?? 3); | |
| var_dump($arr["foobar"] ?? 3); | |
| var_dump($arr["qux"] ?? 3); | |
| var_dump($arr["bing"][0] ?? 3); | |
| var_dump($arr["bing"][1] ?? 3); | |
| echo PHP_EOL; | |
| var_dump(foobar()[0] ?? false); | |
| echo PHP_EOL; | |
| function f($x) | |
| { | |
| printf("%s(%d)\n", __FUNCTION__, $x); | |
| return $x; | |
| } | |
| $a = f(null) ?? f(1) ?? f(2); | |
| --EXPECTF-- | |
| int(3) | |
| int(7) | |
| int(3) | |
| int(7) | |
| int(3) | |
| int(7) | |
| int(3) | |
| int(7) | |
| string(3) "bar" | |
| int(3) | |
| object(stdClass)#%d (%d) { | |
| ["boo"]=> | |
| int(7) | |
| } | |
| string(4) "bang" | |
| int(3) | |
| called | |
| string(1) "a" | |
| f(0) | |
| f(1) | |