3v4l.org

run code in 500+ PHP versions simultaneously
<?php enum SpecialReturnValue { case NoReturn; case ReturnWithoutValue; case ReturnDollarThis; case ReturnVoid; case ReturnNever; } class ShouldTypeError { public $uniqueId; public function __construct($returnValue) { static $uniqueId = 0; $this->uniqueId = $uniqueId; $uniqueId++; if ($returnValue !== SpecialReturnValue::NoReturn) { if ($returnValue === SpecialReturnValue::ReturnWithoutValue) { return; } elseif ($returnValue === SpecialReturnValue::ReturnDollarThis) { return $this; } elseif ($returnValue === SpecialReturnValue::ReturnVoid) { return void; } elseif ($returnValue === SpecialReturnValue::ReturnNever) { return never; } return $returnValue; } } } const SOMECONST = 'Const hello'; enum SomeEnum { case Hearts; case Diamonds; case Clubs; case Spades; } function SomeFunction() { } $SomeFunctionClosure = function() { }; $SomeFunctionFirstClassCallable = SomeFunction(...); $someFunctionClosureFromCallabe = Closure::fromCallable('SomeFunction'); $arrowFunction = fn($a) => $a; $testcases = [ SpecialReturnValue::NoReturn, SpecialReturnValue::ReturnWithoutValue, SpecialReturnValue::ReturnDollarThis, new ShouldTypeError(SpecialReturnValue::NoReturn), SOMECONST, 'abc', 1, 1.23, null, true, false, ['a', 'b', 'c'], [6 => 'six', 7 => 'seven', 67 => 'six seven'], ['a' => 'a', 'b' => 'b', 'c' => 'c', 0 => 'Zero'], SpecialReturnValue::ReturnVoid, SpecialReturnValue::ReturnNever, SomeEnum::Spades, function() {}, $SomeFunctionClosure, $SomeFunctionFirstClassCallable, $someFunctionClosureFromCallabe, $arrowFunction, new DateTimeImmutable(), fopen('php://memory', 'w+'), ]; foreach($testcases as $testcase) { echo "--------------[ TESTCASE ]--------------\n"; var_dump($testcase); echo "\n"; try { $didReturn = new ShouldTypeError($testcase); if ($testcase === SpecialReturnValue::NoReturn) { echo "Success: without a return statement is always valid.\n"; } elseif ($testcase === SpecialReturnValue::ReturnWithoutValue) { echo "Success: a return statement without a value is always valid.\n"; } elseif ($testcase === SpecialReturnValue::ReturnDollarThis) { echo "Dubious: return \$this is dubious.\n"; echo "- it fullfills the return type, so it could be allowed.\n"; echo "- but returning anything from a constructor is nonsense, because it is discarded by \"new\".\n"; echo " As shown by the fourth testcase new SomeTypeError(SpecialReturnValue::NoReturn).\n"; } else { echo "Error: why is it not a return TypeError?\n"; } if ($didReturn instanceof ShouldTypeError) { echo "Created uniqueId ".$didReturn->uniqueId."\n"; } else { echo "Failed to new a ShouldTypeError.\n"; } } catch (Throwable $ex) { echo "Success: throwable: ".$ex->getMessage()."\n"; } }
Output for git.master_jit
--------------[ TESTCASE ]-------------- enum(SpecialReturnValue::NoReturn) Success: without a return statement is always valid. Created uniqueId 1 --------------[ TESTCASE ]-------------- enum(SpecialReturnValue::ReturnWithoutValue) Success: a return statement without a value is always valid. Created uniqueId 2 --------------[ TESTCASE ]-------------- enum(SpecialReturnValue::ReturnDollarThis) Dubious: return $this is dubious. - it fullfills the return type, so it could be allowed. - but returning anything from a constructor is nonsense, because it is discarded by "new". As shown by the fourth testcase new SomeTypeError(SpecialReturnValue::NoReturn). Created uniqueId 3 --------------[ TESTCASE ]-------------- object(ShouldTypeError)#8 (1) { ["uniqueId"]=> int(0) } Error: why is it not a return TypeError? Created uniqueId 4 --------------[ TESTCASE ]-------------- string(11) "Const hello" Error: why is it not a return TypeError? Created uniqueId 5 --------------[ TESTCASE ]-------------- string(3) "abc" Error: why is it not a return TypeError? Created uniqueId 6 --------------[ TESTCASE ]-------------- int(1) Error: why is it not a return TypeError? Created uniqueId 7 --------------[ TESTCASE ]-------------- float(1.23) Error: why is it not a return TypeError? Created uniqueId 8 --------------[ TESTCASE ]-------------- NULL Error: why is it not a return TypeError? Created uniqueId 9 --------------[ TESTCASE ]-------------- bool(true) Error: why is it not a return TypeError? Created uniqueId 10 --------------[ TESTCASE ]-------------- bool(false) Error: why is it not a return TypeError? Created uniqueId 11 --------------[ TESTCASE ]-------------- array(3) { [0]=> string(1) "a" [1]=> string(1) "b" [2]=> string(1) "c" } Error: why is it not a return TypeError? Created uniqueId 12 --------------[ TESTCASE ]-------------- array(3) { [6]=> string(3) "six" [7]=> string(5) "seven" [67]=> string(9) "six seven" } Error: why is it not a return TypeError? Created uniqueId 13 --------------[ TESTCASE ]-------------- array(4) { ["a"]=> string(1) "a" ["b"]=> string(1) "b" ["c"]=> string(1) "c" [0]=> string(4) "Zero" } Error: why is it not a return TypeError? Created uniqueId 14 --------------[ TESTCASE ]-------------- enum(SpecialReturnValue::ReturnVoid) Success: throwable: Undefined constant "void" --------------[ TESTCASE ]-------------- enum(SpecialReturnValue::ReturnNever) Success: throwable: Undefined constant "never" --------------[ TESTCASE ]-------------- enum(SomeEnum::Spades) Error: why is it not a return TypeError? Created uniqueId 17 --------------[ TESTCASE ]-------------- object(Closure)#12 (3) { ["name"]=> string(22) "{closure:/in/svfeO:84}" ["file"]=> string(9) "/in/svfeO" ["line"]=> int(84) } Error: why is it not a return TypeError? Created uniqueId 18 --------------[ TESTCASE ]-------------- object(Closure)#1 (3) { ["name"]=> string(22) "{closure:/in/svfeO:51}" ["file"]=> string(9) "/in/svfeO" ["line"]=> int(51) } Error: why is it not a return TypeError? Created uniqueId 19 --------------[ TESTCASE ]-------------- object(Closure)#2 (1) { ["function"]=> string(12) "SomeFunction" } Error: why is it not a return TypeError? Created uniqueId 20 --------------[ TESTCASE ]-------------- object(Closure)#3 (1) { ["function"]=> string(12) "SomeFunction" } Error: why is it not a return TypeError? Created uniqueId 21 --------------[ TESTCASE ]-------------- object(Closure)#4 (4) { ["name"]=> string(22) "{closure:/in/svfeO:59}" ["file"]=> string(9) "/in/svfeO" ["line"]=> int(59) ["parameter"]=> array(1) { ["$a"]=> string(10) "<required>" } } Error: why is it not a return TypeError? Created uniqueId 22 --------------[ TESTCASE ]-------------- object(DateTimeImmutable)#13 (3) { ["date"]=> string(26) "2026-01-31 12:59:15.005897" ["timezone_type"]=> int(3) ["timezone"]=> string(16) "Europe/Amsterdam" } Error: why is it not a return TypeError? Created uniqueId 23 --------------[ TESTCASE ]-------------- resource(5) of type (stream) Error: why is it not a return TypeError? Created uniqueId 24
Output for git.master
--------------[ TESTCASE ]-------------- enum(SpecialReturnValue::NoReturn) Success: without a return statement is always valid. Created uniqueId 1 --------------[ TESTCASE ]-------------- enum(SpecialReturnValue::ReturnWithoutValue) Success: a return statement without a value is always valid. Created uniqueId 2 --------------[ TESTCASE ]-------------- enum(SpecialReturnValue::ReturnDollarThis) Dubious: return $this is dubious. - it fullfills the return type, so it could be allowed. - but returning anything from a constructor is nonsense, because it is discarded by "new". As shown by the fourth testcase new SomeTypeError(SpecialReturnValue::NoReturn). Created uniqueId 3 --------------[ TESTCASE ]-------------- object(ShouldTypeError)#8 (1) { ["uniqueId"]=> int(0) } Error: why is it not a return TypeError? Created uniqueId 4 --------------[ TESTCASE ]-------------- string(11) "Const hello" Error: why is it not a return TypeError? Created uniqueId 5 --------------[ TESTCASE ]-------------- string(3) "abc" Error: why is it not a return TypeError? Created uniqueId 6 --------------[ TESTCASE ]-------------- int(1) Error: why is it not a return TypeError? Created uniqueId 7 --------------[ TESTCASE ]-------------- float(1.23) Error: why is it not a return TypeError? Created uniqueId 8 --------------[ TESTCASE ]-------------- NULL Error: why is it not a return TypeError? Created uniqueId 9 --------------[ TESTCASE ]-------------- bool(true) Error: why is it not a return TypeError? Created uniqueId 10 --------------[ TESTCASE ]-------------- bool(false) Error: why is it not a return TypeError? Created uniqueId 11 --------------[ TESTCASE ]-------------- array(3) { [0]=> string(1) "a" [1]=> string(1) "b" [2]=> string(1) "c" } Error: why is it not a return TypeError? Created uniqueId 12 --------------[ TESTCASE ]-------------- array(3) { [6]=> string(3) "six" [7]=> string(5) "seven" [67]=> string(9) "six seven" } Error: why is it not a return TypeError? Created uniqueId 13 --------------[ TESTCASE ]-------------- array(4) { ["a"]=> string(1) "a" ["b"]=> string(1) "b" ["c"]=> string(1) "c" [0]=> string(4) "Zero" } Error: why is it not a return TypeError? Created uniqueId 14 --------------[ TESTCASE ]-------------- enum(SpecialReturnValue::ReturnVoid) Success: throwable: Undefined constant "void" --------------[ TESTCASE ]-------------- enum(SpecialReturnValue::ReturnNever) Success: throwable: Undefined constant "never" --------------[ TESTCASE ]-------------- enum(SomeEnum::Spades) Error: why is it not a return TypeError? Created uniqueId 17 --------------[ TESTCASE ]-------------- object(Closure)#12 (3) { ["name"]=> string(22) "{closure:/in/svfeO:84}" ["file"]=> string(9) "/in/svfeO" ["line"]=> int(84) } Error: why is it not a return TypeError? Created uniqueId 18 --------------[ TESTCASE ]-------------- object(Closure)#1 (3) { ["name"]=> string(22) "{closure:/in/svfeO:51}" ["file"]=> string(9) "/in/svfeO" ["line"]=> int(51) } Error: why is it not a return TypeError? Created uniqueId 19 --------------[ TESTCASE ]-------------- object(Closure)#2 (1) { ["function"]=> string(12) "SomeFunction" } Error: why is it not a return TypeError? Created uniqueId 20 --------------[ TESTCASE ]-------------- object(Closure)#3 (1) { ["function"]=> string(12) "SomeFunction" } Error: why is it not a return TypeError? Created uniqueId 21 --------------[ TESTCASE ]-------------- object(Closure)#4 (4) { ["name"]=> string(22) "{closure:/in/svfeO:59}" ["file"]=> string(9) "/in/svfeO" ["line"]=> int(59) ["parameter"]=> array(1) { ["$a"]=> string(10) "<required>" } } Error: why is it not a return TypeError? Created uniqueId 22 --------------[ TESTCASE ]-------------- object(DateTimeImmutable)#13 (3) { ["date"]=> string(26) "2026-01-31 12:59:15.005980" ["timezone_type"]=> int(3) ["timezone"]=> string(16) "Europe/Amsterdam" } Error: why is it not a return TypeError? Created uniqueId 23 --------------[ TESTCASE ]-------------- resource(5) of type (stream) Error: why is it not a return TypeError? Created uniqueId 24

This tab shows result from various feature-branches currently under review by the php developers. Contact me to have additional branches featured.

Active branches

Archived branches

Once feature-branches are merged or declined, they are no longer available. Their functionality (when merged) can be viewed from the main output page

preferences:
55.73 ms | 629 KiB | 4 Q