find the smallest key in a map in php

To find the smallest key in a PHP map (which is actually an associative array), we can use the built-in min() function in combination with the array_keys() function.

Here's an example:

main.php
$myMap = array(
  "c" => 3,
  "a" => 1,
  "b" => 2
);

$smallestKey = min(array_keys($myMap));
echo $smallestKey; // Output: "a"
129 chars
9 lines

In this example, we have a map $myMap with three key-value pairs. We pass the keys of the array to min() using array_keys(), and then output the result. The output of this code will be the smallest key in the map, which is "a".