LoliPHP/helper/php8compat.php

<?php
  if (!function_exists("str_starts_with")) {
    function str_starts_with (string $haystack, string $needle): bool {
      return (string)$needle !== "" && strncmp($haystack, $needle, strlen($needle)) === 0;
    }
  }

  if (!function_exists("str_ends_with")) {
    function str_ends_with (string $haystack, string $needle): bool {
      $needle_len = strlen($needle);
      return ($needle_len === 0 || 0 === substr_compare($haystack, $needle, - $needle_len));
    }
  }

  if (!function_exists("str_contains")) {
    function str_contains (string $haystack, string $needle): bool {
      return $needle !== "" && mb_strpos($haystack, $needle) !== false;
    }
  }

  if (!function_exists("array_key_first")) {
    function array_key_first (array $array): int|string|null {
      if (!is_array($array) || empty($array)) return NULL;
      return array_keys($array)[0];
    }
  }

  if (!function_exists("array_key_last")) {
    function array_key_last (array $array): int|string|null {
      if (!is_array($array) || empty($array)) return NULL;
      return array_keys($array)[count($array)-1];
    }
  }
?>