PHP实现的62进制转10进制，10进制转62进制函数示例

function from62to10($str){  $dict = '0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ';  $len = strlen($str);  $dec = 0;  for($i = 0;$i<$len;$i++){    //找到对应字典的下标    $pos = strpos($dict, $str[$i]);    $dec += $pos*pow(62,$len-$i-1);  }  return $dec;}echo from62to10('6r2HqO');echo '<br>';$dec = '5896401674';function from10to62($dec) {  $dict = '0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ';  $result = '';  do {    $result = $dict[$dec % 62] . $result;    $dec = intval($dec / 62);  } while ($dec != 0);  return $result;}echo from10to62($dec);