UTF8 encode deprecated in PHP 8.x

[mae1cum77]

Script getting utf8_encoding() is deprecated message in PHP 8.x, not working due to it.

function endWithJsonResponse($responseData, $filename = NULL) {

  if($responseData) {
    array_walk_recursive($responseData, function(&$value, &$key) {
      if(is_string($value)) $value = utf8_encode($value);
    });  
  }

Needs to be changed to something like:

function iso8859_1_to_utf8(string $s): string {
  $s .= $s;
  $len = \strlen($s);

  for ($i = $len >> 1, $j = 0; $i < $len; ++$i, ++$j) {
      switch (true) {
          case $s[$i] < "\x80": $s[$j] = $s[$i]; break;
          case $s[$i] < "\xC0": $s[$j] = "\xC2"; $s[++$j] = $s[$i]; break;
          default: $s[$j] = "\xC3"; $s[++$j] = \chr(\ord($s[$i]) - 64); break;
      }
  }

  return substr($s, 0, $j);
}

function endWithJsonResponse($responseData, $filename = NULL) {

  if($responseData) {
    array_walk_recursive($responseData, function(&$value, &$key) {
      if(is_string($value)) $value = iso8859_1_to_utf8($value);
    });  
  }