A simple array

$cars =
[
	"Maruti" => "200000",
	"Suzuki" => "400000",
];

var_dump($cars);

Result

array(2) { ["Maruti"]=> string(6) "200000" ["Suzuki"]=> string(6) "400000" }

Type Casting and Overwriting example

$abc = array
(
	1	=> "a",
	"1"	=> "b",
	1.5	=> "c",
	true	=> "d",
);

var_dump($abc);

Results

array(1) { [1]=> string(1) "d" }

Mixed integer and string keys

$array = array(
    "foo" => "bar",
    "bar" => "foo",
    100   => -100,
    -100  => 100,
);
var_dump($array);	

Results

array(4) { ["foo"]=> string(3) "bar" ["bar"]=> string(3) "foo" [100]=> int(-100) [-100]=> int(100) }

Indexed arrays without key

$fruits = array ('Banana', 'Mango', 'Melon', 'Orange');
var_dump($fruits);

Result

array(4) { [0]=> string(6) "Banana" [1]=> string(5) "Mango" [2]=> string(5) "Melon" [3]=> string(6) "Orange" }

Keys not on all elements

It is possible to specify the key only for some elements and leave it out for others:

$abc = array(

			"a",
			"b",
	6	=>	"c",
			"d",
	9	=>	"e",
			"f",
	);
var_dump($abc);

Result

array(6) { [0]=> string(1) "a" [1]=> string(1) "b" [6]=> string(1) "c" [7]=> string(1) "d" [9]=> string(1) "e" [10]=> string(1) "f" }

Accessing array elements

$array = array
(
	"foo"	=> "bar",
	42	=>	24,

		"Multi" => array
		(
			"dimensional" => array
			(
				"array" => "foo"
			)
		)
);

array(3) { ["foo"]=> string(3) "bar" [42]=> int(24) ["Multi"]=> array(1) { ["dimensional"]=> array(1) { ["array"]=> string(3) "foo" } } } string(3) "bar" int(24) string(3) "foo"

Array dereferencing

function getArray(){
	return array(1, 2, 3);
}
var_dump(getArray());	

Result

array(3) { [0]=> int(1) [1]=> int(2) [2]=> int(3) } array(2) { [5]=> int(1) [6]=> int(2) } array(3) { [5]=> int(1) [6]=> int(2) [7]=> int(56) } array(4) { [5]=> int(1) [6]=> int(2) [7]=> int(56) ["x"]=> int(42) } array(5) { [5]=> int(1) [6]=> int(2) [7]=> int(56) ["x"]=> int(42) [8]=> int(142) } array(4) { [6]=> int(2) [7]=> int(56) ["x"]=> int(42) [8]=> int(142) }