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@ 2021-10-12T10:37:19Z

<?php

print "Empty array\n";
$map_row = [];
var_dump(isset($map_row['rollback_action']) && $map_row['rollback_action'] == 0);
var_dump(array_key_exists('rollback_action', $map_row) && $map_row['rollback_action'] == 0);

print "\n\nrollback_action = 0\n";
$map_row = ['rollback_action' => 0];
var_dump(isset($map_row['rollback_action']) && $map_row['rollback_action'] == 0);
var_dump(array_key_exists('rollback_action', $map_row) && $map_row['rollback_action'] == 0);

print "\n\nrollback_action = NULL\n";
$map_row = ['rollback_action' => NULL];
var_dump(isset($map_row['rollback_action']) && $map_row['rollback_action'] == 0);
var_dump(array_key_exists('rollback_action', $map_row) && $map_row['rollback_action'] == 0);

print "\n\map_row = FALSE\n";
$map_row = FALSE;
var_dump(isset($map_row['rollback_action']) && $map_row['rollback_action'] == 0);
var_dump(array_key_exists('rollback_action', $map_row) && $map_row['rollback_action'] == 0);

Output for git.master, git.master_jit: Empty array bool(false) bool(false) rollback_action = 0 bool(true) bool(true) rollback_action = NULL bool(false) bool(true) \map_row = FALSE bool(false) Fatal error: Uncaught TypeError: array_key_exists(): Argument #2 ($array) must be of type array, bool given in /in/628ck:21 Stack trace: #0 {main} thrown in /in/628ck on line 21
Process exited with code 255.
Output for rfc.property-hooks: Empty array bool(false) bool(false) rollback_action = 0 bool(true) bool(true) rollback_action = NULL bool(false) bool(true) \map_row = FALSE bool(false) Fatal error: Uncaught TypeError: array_key_exists(): Argument #2 ($array) must be of type array, false given in /in/628ck:21 Stack trace: #0 {main} thrown in /in/628ck on line 21
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2016-08-14 Arrow functions - withdrawn
2016-05-29 array_change_keys() - withdrawn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2016-03-16 Typed Properties - superseded in favor of Typed Properties 2.0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2015-05-01 Short Closures - declined / withdrawn in favor of Arrow Functions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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