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@ 2014-06-13T11:32:25Z

<?php
function bool2str($bool)
{
    if ($bool === false) {
        return 'FALSE';
    } else {
        return 'TRUE';
    }
}

function compareObjects(&$o1, &$o2)
{
    echo 'o1 == o2 : ' . bool2str($obj1->equals($obj2))  . "\n";
    echo 'o1 != o2 : ' . bool2str($obj1 instanceof $obj2) . "\n";
}

class Flag
{
    public $flag;

    function Flag($flag = true) {
        $this->flag = $flag;
    }
}

class OtherFlag
{
    public $flag;

    function OtherFlag($flag = true) {
        $this->flag = $flag;
    }
}

$o = new Flag();
$p = new Flag();
$q = $o;
$r = new OtherFlag();

echo "Два экземпляра одного и того же класса\n";
compareObjects($o, $p);

echo "\nДве ссылки на один и тот же экземпляр\n";
compareObjects($o, $q);

echo "\nЭкземпляры двух разных классов\n";
compareObjects($o, $r);

Output for git.master, git.master_jit, rfc.property-hooks: Два экземпляра одного и того же класса Warning: Undefined variable $obj1 in /in/PA16c on line 13 Fatal error: Uncaught Error: Call to a member function equals() on null in /in/PA16c:13 Stack trace: #0 /in/PA16c(41): compareObjects(Object(Flag), Object(Flag)) #1 {main} thrown in /in/PA16c on line 13
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2016-08-14 Arrow functions - withdrawn
2016-05-29 array_change_keys() - withdrawn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2016-03-16 Typed Properties - superseded in favor of Typed Properties 2.0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2015-05-01 Short Closures - declined / withdrawn in favor of Arrow Functions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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