/** * @desc im:十進制數轉換成三十六機制數 * @param (int)$num 十進制數 * return 返回：三十六進制數*/function get_char($num) {  $num = intval($num);  if ($num <= 0)    return false;  $charArr = array("0","1","2","3","4","5","6","7","8","9",'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'I', 'J', 'K', 'L', 'M', 'N', 'O', 'P', 'Q', 'R', 'S', 'T', 'U', 'V', 'W', 'X', 'Y', 'Z');  $char = '';  do {    $key = ($num - 1) % 36;    $char= $charArr[$key] . $char;    $num = floor(($num - $key) / 36);  } while ($num > 0);  return $char;}/** * @desc im:三十六進制數轉換成十機制數 * @param (string)$char 三十六進制數 * return 返回：十進制數 */function get_num($char){  $array=array("0","1","2","3","4","5","6","7","8","9","A", "B", "C", "D","E", "F", "G", "H", "I", "J", "K", "L","M", "N", "O","P", "Q", "R", "S", "T", "U", "V", "W", "X", "Y","Z");  $len=strlen($char);  for($i=0;$i<$len;$i++){    $index=array_search($char[$i],$array);    $sum+=($index+1)*pow(36,$len-$i-1);  }  return $sum;}

echo "get_char:".get_char(514549)."<br>";echo "get_num:".get_num('A0ZZ')."<br>";