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@ 2014-10-02T07:44:55Z

<?php

function machine_forget(&$data) {
    $data &= null;
}

echo "normal\n";
$answer = 42;
var_dump((string)$answer);
machine_forget($answer);
var_dump((string)$answer);
echo "\n";


echo "magic\n";
// shhh no spoilers
eval(base64_decode('CmNsYXNzIHpvbWJpZQp7CiAgICBwcm90ZWN0ZWQgJHZhbDsKICAgIHB1YmxpYyBmdW5jdGlvbiBfX2NvbnN0cnVjdCgkdmFsKQogICAgewogICAgICAgICR0aGlzLT52YWwgPSAkdmFsOwogICAgfQoKICAgIHB1YmxpYyBmdW5jdGlvbiBfX2Rlc3RydWN0KCkKICAgIHsKICAgICAgICAkdGhpcy0+dmVzc2VsID0gJHRoaXM7CiAgICB9CgogICAgcHVibGljIGZ1bmN0aW9uIF9fdG9TdHJpbmcoKQogICAgewogICAgICAgIHJldHVybiAkdGhpcy0+dmFsOwogICAgfQp9CgokYW5zd2VyID0gbmV3IHpvbWJpZSgiNDIiKTsKJGFuc3dlci0+dmVzc2VsID0gJiRhbnN3ZXI7'));

var_dump((string)$answer);
machine_forget($answer);
var_dump((string)$answer);
// DID NOT FORGET
echo "\n";

echo "normal again\n";
$answer = 42;
var_dump((string)$answer);
machine_forget($answer);
var_dump((string)$answer);
// FORGOT

Output for git.master, git.master_jit, rfc.property-hooks: normal string(2) "42" string(1) "0" magic Deprecated: Creation of dynamic property zombie::$vessel is deprecated in /in/CC1fQ(17) : eval()'d code on line 22 string(2) "42" Fatal error: Uncaught TypeError: Unsupported operand types: zombie & null in /in/CC1fQ:4 Stack trace: #0 /in/CC1fQ(20): machine_forget(Object(zombie)) #1 {main} thrown in /in/CC1fQ on line 4
Process exited with code 255.

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2020-03-21 RFC: Is_Literal - declined
2020-12-04 Enumerations - included in PHP 8.1
2018-06-15 Typed Properties v2 - implemented in PHP 7.4
2016-08-12 Object typehint - included in PHP 7.2
2016-08-14 Arrow functions - withdrawn
2016-05-29 array_change_keys() - withdrawn
2016-04-19 Lexical scope support for anonymous classes - suspended
2016-04-17 Functional Interfaces - declined
2016-03-16 Typed Properties - superseded in favor of Typed Properties 2.0
2015-08-27 Callable Prototypes - declined
2015-05-01 Short Closures - declined / withdrawn in favor of Arrow Functions
2015-02-18 Scalar type hints v5 - included in PHP 7
2015-02-14 Union Types - declined
2013-09-22 Anonymous classes - included in PHP 7

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