Online PHP editor | rfc for m9KoC

@ 2018-01-11T13:39:38Z

<?php

$action = $_POST['action'] ?? 'default';

echo "Null coalesce with undefined variable: ";
var_dump($action);

if (isset($_POST['action'])) {
    $action = $_POST['action'];
} else {
    $action = 'default';
}

echo "If with undefined variable:            ";
var_dump($action);
echo "\n";

// -----------------------------------------

$_POST['action'] = 'value';

$action = $_POST['action'] ?? 'default';

echo "Null coalesce with value:              ";
var_dump($action);

$_POST['action'] = 'value';

if (isset($_POST['action'])) {
    $action = $_POST['action'];
} else {
    $action = 'default';
}

echo "If with value:                         ";
var_dump($action);
echo "\n";

// -----------------------------------------

$_POST['action'] = null;

$action = $_POST['action'] ?? 'default';

echo "Null coalesce with explicit NULL:      ";
var_dump($action);

// -----------------------------------------

$_POST['action'] = null;

if (isset($_POST['action'])) {
    $action = $_POST['action'];
} else {
    $action = 'default';
}

echo "If with explicit NULL:                 ";
var_dump($action);

Output for git.master, git.master_jit, rfc.property-hooks: Null coalesce with undefined variable: string(7) "default" If with undefined variable: string(7) "default" Null coalesce with value: string(5) "value" If with value: string(5) "value" Null coalesce with explicit NULL: string(7) "default" If with explicit NULL: string(7) "default"

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2016-08-14 Arrow functions - withdrawn
2016-05-29 array_change_keys() - withdrawn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2016-03-16 Typed Properties - superseded in favor of Typed Properties 2.0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2015-05-01 Short Closures - declined / withdrawn in favor of Arrow Functions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