- Output for git.master, git.master_jit, rfc.property-hooks
- <table border="1"><tr><th>Value of variable ($var)</th><th>isset($var)</th><th>empty($var)</th><th>is_null($var)</th></tr><tr><td>"" (an empty string)</td><td>bool(true) </td><td>bool(true) </td><td>bool(false) </td></tr><tr><td>" " (space)</td><td>bool(true) </td><td>bool(false) </td><td>bool(false) </td></tr><tr><td>FALSE</td><td>bool(true) </td><td>bool(true) </td><td>bool(false) </td></tr><tr><td>TRUE</td><td>bool(true) </td><td>bool(false) </td><td>bool(false) </td></tr><tr><td>array() (an empty array)</td><td>bool(true) </td><td>bool(true) </td><td>bool(false) </td></tr><tr><td>NULL</td><td>bool(false) </td><td>bool(true) </td><td>bool(true) </td></tr><tr><td>"0" (0 as a string)</td><td>bool(true) </td><td>bool(true) </td><td>bool(false) </td></tr><tr><td>0 (0 as an integer)</td><td>bool(true) </td><td>bool(true) </td><td>bool(false) </td></tr><tr><td>0.0 (0 as a float)</td><td>bool(true) </td><td>bool(true) </td><td>bool(false) </td></tr><tr><td>var $var; (a variable declared, but without a value)</td><td>bool(false) </td><td>bool(true) </td><td> Warning: Undefined variable $var in /in/QWKXE on line 92 bool(true) </td></tr><tr><td>NULL byte ("\ 0")</td><td>bool(true) </td><td>bool(false) </td><td>bool(false) </td></tr></table>
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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- 2016-08-14 Arrow functions - withdrawn
- 2016-05-29 array_change_keys() - withdrawn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- 2016-03-16 Typed Properties - superseded in favor of Typed Properties 2.0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- 2015-05-01 Short Closures - declined / withdrawn in favor of Arrow Functions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