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.