PHP array index or throw code example

Example 1: php array

<?php
$array = array("foo", "bar", "hello", "world");
var_dump($array);
?>

Example 2: php define variables from array associative

<?php
	$array = [
		'key1' => 'foo',
  		'key2' => 'bar',
	];
	extract($array);
	
	echo $key1; //print foo
	echo $key2; //print bar
?>