php helper functions (to ensure version compatibility)

functions.inc.php

<?php
  /**
   * Helper function to avoid problems with the switches argument order of implode since php 7.4.0
   *
   * @see: https://www.php.net/manual/function.implode.php
   * @see: https://3v4l.org/MZRZA
   *
   * @param String $glue
   * @param array  $pieces
   *
   * @return string
   */
  protected static function implode($glue, $pieces) {
    if(func_num_args() == 1) {
      $pieces = $glue;
      $glue = "";
    }
    return (version_compare(PHP_VERSION, '7.4.0') >= 0)
      ? implode($glue,$pieces)
      : implode($pieces,$glue);
  }

?>