Online PHP editor | rfc for 81sh5

@ 2025-09-15T15:50:12Z

<?php

$a = [];
$a['b']['c']['d'] = 1;
$a['b']['c']['d2'] = new stdclass();
$a['b']['c']['d3'] = [];

var_dump(isset($a['b']['c']['d'])); // as expected, and within type
var_dump(isset($a['b']['c']['f'])); // as expected, and within type

var_dump(isset($a['b']['c']['d']['g']));   // as expected, because 'd' is 1
var_dump(isset($a['b']['c']['d']->g));     // as expected, because 'd' is 1

var_dump(isset($a['b']['c']['d3']->f));    // as expected, because 'd' is an array
var_dump(isset($a['b']['c']['d3']['f']));  // as expected, because 'd' is an array

var_dump(isset($a['b']['c']['d2']->f));   // as expected, because 'd' is an object
var_dump(isset($a['b']['c']['d2']['f']));   // fatal error!! 

var_dump(isset($a['b']['c']['D']['g']->f));   // as expected, because 'D' is actually null
var_dump(isset($a['b']['c']['D']['g']['f'])); // as expected, because 'D' is actually null

// isset($a['b']['c']['d']) is set so following are true and within type
var_dump(isset($a['b']['c']));
var_dump(isset($a['b']));

$i = 1;
echo $i[3]; // error,

Output for git.master, git.master_jit: bool(true) bool(false) bool(false) bool(false) bool(false) bool(false) bool(false) Fatal error: Uncaught Error: Cannot use object of type stdClass as array in /in/81sh5:18 Stack trace: #0 {main} thrown in /in/81sh5 on line 18
Process exited with code 255.

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2022-12-01 RFC: Property hooks - included in PHP 8.4
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2016-08-14 Arrow functions - withdrawn
2016-05-29 array_change_keys() - withdrawn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2016-03-16 Typed Properties - superseded in favor of Typed Properties 2.0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2015-05-01 Short Closures - declined / withdrawn in favor of Arrow Functions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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