'callable' was implemented as a typehint in 5.4
New features
PHP 5.4.0 offers a wide range of new features:
- Support for traits has been added.
-
Short array syntax has been added, e.g.
$a = [1, 2, 3, 4];or$a = ['one' => 1, 'two' => 2, 'three' => 3, 'four' => 4];. -
Function array dereferencing has been added, e.g.
foo()[0]. -
Closures now support
$this. -
<?=is now always available, regardless of the short_open_tag php.ini option. -
Class member access on instantiation has been added,
e.g.
(new Foo)->bar(). -
Class::{expr}()syntax is now supported. -
Binary number format has been added, e.g.
0b001001101. - Improved parse error messages and improved incompatible arguments warnings.
- The session extension can now track the upload progress of files.
- Built-in development web server in CLI mode.
- The GD extension now supports reading and writing of WebP images via imagecreatefromwebp() and imagewebp(), respectively.
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User Contributed Notes 3 notes
dave1010 at gmail dot com ¶
13 years ago
As of PHP 5.4, the CLI (using readline) no longer dies on fatal errors (for example calling undefined functions).
Joris Berthelot ¶
7 years ago
PHP 5.4 also allows to use arrays in switch:
<?php
$foo = 1;
$bar = 2;
switch([$foo, $bar]) {
case [1, 2]:
echo 'case 1';
break;
case [2, 2]:
echo 'case 2';
break;
case [3, 4]:
echo 'case 3';
break;
}
// Will output "case 1"
?>
