The PHP Array

Currently, a more modern approach is to create an array using square brackets [ ], like this:

<?php
	$arr = ['a', 'b', 'c'];
?>

You can access any element by its number (zero-based numbering). Let's output, for example, the element 'a':

<?php
	$arr = ['a', 'b', 'c'];
	echo $arr[0]; // outputs 'a'
?>

And now the element 'b':

<?php
	$arr = ['a', 'b', 'c'];
	echo $arr[1]; // outputs 'b'
?>

You can create arrays with custom keys. Such arrays are called associative. Let's create such an array:

<?php
	$arr = ['key1' => 1, 'key2' => 2, 'key3' => 3];
?>

Let's output, for example, the element with the key 'key1':

<?php
	$arr = ['key1' => 1, 'key2' => 2, 'key3' => 3];
	echo $arr['key1']; // outputs 1
?>

And now with the key 'key2':

<?php
	$arr = ['key1' => 1, 'key2' => 2, 'key3' => 3];
	echo $arr['key2']; // outputs 2
?>

See Also