For PHP version 7 and above

$array = array(
      "1" => "PHP code tester Sandbox Online",  
    "foo" => "bar",
    "case" => "Random Stuff: " . rand(100,999),
    "PHP Version" => phpversion()
);
             
$firstValue = reset($colors); // PHP code tester Sandbox Online
$firstKey = key($colors); // 1