Online PHP editor | rfc for D8H2k

@ 2017-04-06T10:20:37Z

<?php

$x = 0;
echo PHP_EOL.'$x = 0;'.PHP_EOL;
var_dump(is_null($x));
var_dump(!empty($x));
var_dump(isset($x));
var_dump(empty($x));

$x = '0';
echo PHP_EOL.'$x = '."'".'0'."'".';'.PHP_EOL;
var_dump(is_null($x));
var_dump(!empty($x));
var_dump(isset($x));
var_dump(empty($x));

$x = '';
echo PHP_EOL.'$x = '."''".';'.PHP_EOL;
var_dump(is_null($x));
var_dump(!empty($x));
var_dump(isset($x));
var_dump(empty($x));

$x = NULL;
echo PHP_EOL.'$x = NULL;'.PHP_EOL;
var_dump(is_null($x));
var_dump(!empty($x));
var_dump(isset($x));
var_dump(empty($x));

$x = TRUE;
echo PHP_EOL.'$x = TRUE;'.PHP_EOL;
var_dump(is_null($x));
var_dump(!empty($x));
var_dump(isset($x));
var_dump(empty($x));

$x = FALSE;
echo PHP_EOL.'$x = FALSE;'.PHP_EOL;
var_dump(is_null($x));
var_dump(!empty($x));
var_dump(isset($x));
var_dump(empty($x));

$x = array();
echo PHP_EOL.'$x = array();'.PHP_EOL;
var_dump(is_null($x));
var_dump(!empty($x));
var_dump(isset($x));
var_dump(empty($x));

unset($x);
echo PHP_EOL.'unset($x);'.PHP_EOL;
var_dump(is_null($x));
var_dump(!empty($x));
var_dump(isset($x));
var_dump(empty($x));

Output for git.master, git.master_jit, rfc.property-hooks: $x = 0; bool(false) bool(false) bool(true) bool(true) $x = '0'; bool(false) bool(false) bool(true) bool(true) $x = ''; bool(false) bool(false) bool(true) bool(true) $x = NULL; bool(true) bool(false) bool(false) bool(true) $x = TRUE; bool(false) bool(true) bool(true) bool(false) $x = FALSE; bool(false) bool(false) bool(true) bool(true) $x = array(); bool(false) bool(false) bool(true) bool(true) unset($x); Warning: Undefined variable $x in /in/D8H2k on line 54 bool(true) bool(false) bool(false) bool(true)

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2016-08-14 Arrow functions - withdrawn
2016-05-29 array_change_keys() - withdrawn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2016-03-16 Typed Properties - superseded in favor of Typed Properties 2.0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2015-05-01 Short Closures - declined / withdrawn in favor of Arrow Functions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