Online PHP editor | rfc for 6Ua8t

@ 2023-01-19T19:24:36Z

<?php

function get_calling_scope() {
    $trace = debug_backtrace(\DEBUG_BACKTRACE_PROVIDE_OBJECT);
    array_shift($trace); // Remove current frame

    $frame = array_shift($trace);
    if ($frame === null) {
        return null;
    }
    
    $function = $frame['function'];
    if (!in_array($function, ['__get', '__set', '__isset', '__unset', '__call', '__callStatic'], true)) {
        return null;
    }

    $object = $frame['object'] ?? null;
    $property = $frame['args'][0];
    
    foreach ($trace as $previousFrame) {
        $previousObject = $previousFrame['object'] ?? null;
        if ($previousFrame['function'] !== $function
            || $previousObject !== $object
            || $previousFrame['args'][0] !== $property) {
            return $previousObject !== null
                ? $previousObject::class
                : null;
        }
    }
    
    return null;
}

class Foo {
    public function __get($name) {
        var_dump(get_calling_scope());
        return '';
    }

    public function test() {
        $this->bar;
    }
}

class Bar extends Foo {
    public function __get($name) {
        parent::__get($name);
        return '';
    }
}

$foo = new Foo();
$foo->bar;
$foo->test();

$bar = new Bar();
$bar->test();

Output for git.master, git.master_jit, rfc.property-hooks: NULL string(3) "Foo" string(3) "Bar"

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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2016-08-14 Arrow functions - withdrawn
2016-05-29 array_change_keys() - withdrawn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2016-03-16 Typed Properties - superseded in favor of Typed Properties 2.0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2015-05-01 Short Closures - declined / withdrawn in favor of Arrow Functions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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