em4100_decoder/em4100Decode.php at master · dminko/em4100_decoder · GitHub

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<?php

error_reporting(E_ALL & ~E_NOTICE);

// Със STR_PAD_LEFT
//
//[1111111110100100011000000000001001011111010001010001011000100110] => 0000000001000111,1010010100101000
//																					  71,           42280           <-------------
//																								  4695336           <-------------
//[1111111110100100011000000000001001011111010001010000001110101110] => 0000000001000111,1010010100001110
//                                                                                    71,           42254           <-------------
//																								  4695310           <-------------
//[1111111110011000000000000000010100100101001010100001011011110100] => 0000000010101001,1001101000101011
//																					 169,           39467           <-------------
//																								 11115051           <-------------


// $rfid[] = "26 16 45 5F 02 60 A4 FF"; //  4695336 или 071,42280
// $rfid[] = "AE 03 45 5F 02 60 A4 FF"; //  4695310 или 071,42254
//$rfid = "F4 16 2A 25 05 00 98 FF"; // 11115051 или 169,39467

$rfid = "2A 51 9C E4 C3 60 80 FF";

/***
/* return array
***/
function reverseOrder($input)
{
    $i = strlen($input);
    $res = array();
    $ri = 0;

    while (1 <= $i) {
        $i--;
        $ch = substr($input, $i, 1);
        if (trim($ch) <> '') {
            $res[$ri] = $ch . $res[$ri];
            if (strlen($res[$ri]) == 2) {
                $ri++;
            }
        }
    }

    return $res;
}


/***
/* return int
***/
function decode($rfid) {
    $rfid = trim($rfid);
    $resArr = array();

    $resArr = reverseOrder($rfid);

    $bit64 = '';
    foreach ($resArr as $byte) {
        $bit64 .= str_pad(decbin(hexdec($byte)), 8, '0', STR_PAD_LEFT);
    }

    $dataBits = array(	20,21,22,23,
                        25,26,27,28,
                        30,31,32,33,
                        35,36,37,38,
                        40,41,42,43,
                        45,46,47,48,
                        50,51,52,53,
                        55,56,57,58
                    );

    foreach ($dataBits as $bit) {
        $dig .= $bit64{$bit-1};
    }
//     $res = bindec($dig);
//     $res .= " <_--_> " . bindec(substr($dig, 0, 16)) . str_pad( bindec(substr($dig, 16)), 5, '0', STR_PAD_LEFT);
    $res = bindec(substr($dig, 0, 16)) . str_pad( bindec(substr($dig, 16)), 5, '0', STR_PAD_LEFT);

    return $res;
}


function convert55dTo10d($num)
{
    $numLast5d = sprintf('%04s', dechex(substr($num, -5)));
    $numFirst5d = dechex(substr($num, 0, strlen($num) - 5));

    return hexdec($numFirst5d . $numLast5d);
}


//echo decode($rfid) . "<-------->" . convert55dTo10d(decode($rfid));