PHP CRC not the same as Java CRC -


i'm trying crc16 in php , same results in java.

some criteria crc16

  1. polynomial of 8005
  2. initial remainder of 0
  3. a final xor value of 0
  4. neither input nor output reflected

in java pass 5 byte message containing values 1,2,3,4,5 , value 0xb059.

java code

package crc; public class crc {     public static void main(string[] args) {        char crc = 0x0000;         char temp = 0x0000;          char[] data = new char[5];       data[0]=1;data[1]=2;data[2]=3;data[3]=4;data[4]=5;       for(int i=0; i<data.length; i++){           char value = (char)data[i];            temp =(char)(value ^(char)(crc >> 8));           temp =(char)(temp ^(char)(temp >> 4));           temp =(char)(temp ^(char)(temp >> 2));           temp =(char)(temp ^(char)(temp >> 1));           crc = (char)((char)(crc << 8) ^ (char)(temp<<15)^(char)(temp << 2)^temp);       }       system.out.println(crc);     } } 

php code

 function crc16($str){     $crc  = 0x0000;     $temp = 0x0000;     $length = strlen($str);      $data = unpack("c*", $str);     for($i=0;$i<($length);$i++){         $value = $data[$i];          $temp = ($value ^($crc >> 8));         $temp = ($temp ^($temp >> 4));         $temp = ($temp ^($temp >> 2));         $temp = ($temp ^($temp >> 1));         $crc  = (($crc << 8) ^ ($temp<<15)^($temp << 2)^$temp);      }     return $crc;  }    echo crc16("\x01\x02\x03\x04\x05"); 

took code , converted php , no luck.if has direction great.

thanks


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