CODE EXAMPLE FOR PHP

get array first element key php

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