Code snippets from PHP 5.4 blog post

array.php

<?php

// PHP 5.3
$arr = array();
$arr2 = array('a','b','c');
$arr3 = array('a' => 2, 'b' => 4, 'c' => 8);
$arr4 = array(array('abc','def'), array(2,4,8), 16);

// PHP 5.4
$arr = [];
$arr2 = ['a','b','c'];
$arr3 = ['a' => 2, 'b' => 4, 'c' => 8];
$arr4 = [['abc','def'], [2,4,8], 16]];

array_notice.txt

Notice:  Array to string conversion in [...] on line 8

dereferencing.php

<?php

function makeArray() {
    return [1,2,3];
}

// The PHP 5.3 way
$arr = makeArray();
echo $arr[2];

// The PHP 5.4 way
echo makeArray()[2]; // returns 3

obj_dereferencing.php

<?php

// PHP 5.3
$f = new Foo();
echo $f->bar();
 
// PHP 5.4
echo (new Foo)->bar();

traits.php

<?php

trait FooBar {
   ...
}

class Foo {
  use FooBar;
  ...
}