<?php
// 使用数组字面量
$digits = ['B', 'C', 'D', 'F', 'G', 'H', 'J', 'K', 'M', 'P', 'Q', 'R','T', 'V', 'W', 'X', 'Y', '2', '3', '4', '6', '7', '8', '9'];
//foreach ($digits as $digit) {
//    echo $digit."<br>";
//}$hexPid=array(0xc2,0x49,0x4b,0xcc,0x60,0x34,0x09,0xcd,0x96,0xf7,0xec,0x94,0x0e,0x97,0x02);// $decodedChars= ['B', 'C', 'D', 'F', 'G', 'H', 'J', 'K', 'M', 'P', 'Q', 'R',
//        'T', 'V', 'W', 'X', 'Y', '2', '3', '4', '6', '7', '8', '9', '6', '7', '8', '9', '9'];
$decodedChars= array_fill(0, 29, "a"); // 创建一个包含三个 "fruit" 的数组
//print_r($decodedChars);        
//print_r($hexPid[0]);
//    echo "<br>";
//print_r($hexPid);
$decodeLength = 29; 
$decodeStringLength = 15;for ( $i = $decodeLength - 1;$i >= 0; $i--){// Every sixth char is a separator.if (($i + 1) % 6 == 0){$decodedChars[$i] = '-';echo "<br>"."<br>"."\$i=".$i."<br>"; echo "\$ecodedChars[".$i."]=".$decodedChars[$i]."<br>";}else{// Do the actual decoding.$digitMapIndex = 0;echo "<br>"."<br>"."\$i=".$i."<br>";echo "<br>"."\$hexPid= ";for ( $k=0;$k <= $decodeStringLength - 1; $k++){echo "[".$k."]=".str_pad(strtoupper(dechex($hexPid[$k])), 2, '0', STR_PAD_LEFT)." ";//print_r($hexPid[$k]);}//echo "\$hexPid=";//print_r($hexPid);echo "<br>";for ( $j = $decodeStringLength - 1; $j >= 0; $j--){$byteValue = ($digitMapIndex << 8) | $hexPid[$j];echo "<br>"."--------"."\$j=".$j."<br>"; echo  "\$byteValue="."0x".$digitMapIndex.str_pad(strtoupper(dechex($hexPid[$j])),2, '0', STR_PAD_LEFT)."=".$byteValue."<br>";$hexPid[$j] = floor($byteValue / 24);$digitMapIndex = $byteValue % 24;echo $byteValue."=24*".$hexPid[$j]."+".$digitMapIndex."<br>";echo "\$hexPid[".$j."]=".$hexPid[$j]."=0x".str_pad(strtoupper(dechex($hexPid[$j])),2, '0', STR_PAD_LEFT)."<br>";echo "\$digitMapIndex=".$digitMapIndex."<br>";   //echo "digitMapIndex=".$digitMapIndex."<br>";   }$decodedChars[$i] = $digits[$digitMapIndex];echo "\$ecodedChars[".$i."]=".$decodedChars[$i]."<br>";}}echo "<br>"."<br>";for ( $i=0;$i <= $decodeLength - 1; $i++){echo $decodedChars[$i];}//print_r($decodedChars);?>

$i=28

$hexPid= [0]=C2 [1]=49 [2]=4B [3]=CC [4]=60 [5]=34 [6]=09 [7]=CD [8]=96 [9]=F7 [10]=EC [11]=94 [12]=0E [13]=97 [14]=02

--------$j=14
$byteValue=0x002=2
2=24*0+2
$hexPid[14]=0=0x00
$digitMapIndex=2

--------$j=13
$byteValue=0x297=663
663=24*27+15
$hexPid[13]=27=0x1B
$digitMapIndex=15

--------$j=12
$byteValue=0x150E=3854
3854=24*160+14
$hexPid[12]=160=0xA0
$digitMapIndex=14

--------$j=11
$byteValue=0x1494=3732
3732=24*155+12
$hexPid[11]=155=0x9B
$digitMapIndex=12

--------$j=10
$byteValue=0x12EC=3308
3308=24*137+20
$hexPid[10]=137=0x89
$digitMapIndex=20

--------$j=9
$byteValue=0x20F7=5367
5367=24*223+15
$hexPid[9]=223=0xDF
$digitMapIndex=15

--------$j=8
$byteValue=0x1596=3990
3990=24*166+6
$hexPid[8]=166=0xA6
$digitMapIndex=6

--------$j=7
$byteValue=0x6CD=1741
1741=24*72+13
$hexPid[7]=72=0x48
$digitMapIndex=13

--------$j=6
$byteValue=0x1309=3337
3337=24*139+1
$hexPid[6]=139=0x8B
$digitMapIndex=1

--------$j=5
$byteValue=0x134=308
308=24*12+20
$hexPid[5]=12=0x0C
$digitMapIndex=20

--------$j=4
$byteValue=0x2060=5216
5216=24*217+8
$hexPid[4]=217=0xD9
$digitMapIndex=8

--------$j=3
$byteValue=0x8CC=2252
2252=24*93+20
$hexPid[3]=93=0x5D
$digitMapIndex=20

--------$j=2
$byteValue=0x204B=5195
5195=24*216+11
$hexPid[2]=216=0xD8
$digitMapIndex=11

--------$j=1
$byteValue=0x1149=2889
2889=24*120+9
$hexPid[1]=120=0x78
$digitMapIndex=9

--------$j=0
$byteValue=0x9C2=2498
2498=24*104+2
$hexPid[0]=104=0x68
$digitMapIndex=2
$ecodedChars[28]=D


$i=27

$hexPid= [0]=68 [1]=78 [2]=D8 [3]=5D [4]=D9 [5]=0C [6]=8B [7]=48 [8]=A6 [9]=DF [10]=89 [11]=9B [12]=A0 [13]=1B [14]=00

--------$j=14
$byteValue=0x000=0
0=24*0+0
$hexPid[14]=0=0x00
$digitMapIndex=0

--------$j=13
$byteValue=0x01B=27
27=24*1+3
$hexPid[13]=1=0x01
$digitMapIndex=3

--------$j=12
$byteValue=0x3A0=928
928=24*38+16
$hexPid[12]=38=0x26
$digitMapIndex=16

--------$j=11
$byteValue=0x169B=4251
4251=24*177+3
$hexPid[11]=177=0xB1
$digitMapIndex=3

--------$j=10
$byteValue=0x389=905
905=24*37+17
$hexPid[10]=37=0x25
$digitMapIndex=17

--------$j=9
$byteValue=0x17DF=4575
4575=24*190+15
$hexPid[9]=190=0xBE
$digitMapIndex=15

--------$j=8
$byteValue=0x15A6=4006
4006=24*166+22
$hexPid[8]=166=0xA6
$digitMapIndex=22

--------$j=7
$byteValue=0x2248=5704
5704=24*237+16
$hexPid[7]=237=0xED
$digitMapIndex=16

--------$j=6
$byteValue=0x168B=4235
4235=24*176+11
$hexPid[6]=176=0xB0
$digitMapIndex=11

--------$j=5
$byteValue=0x110C=2828
2828=24*117+20
$hexPid[5]=117=0x75
$digitMapIndex=20

--------$j=4
$byteValue=0x20D9=5337
5337=24*222+9
$hexPid[4]=222=0xDE
$digitMapIndex=9

--------$j=3
$byteValue=0x95D=2397
2397=24*99+21
$hexPid[3]=99=0x63
$digitMapIndex=21

--------$j=2
$byteValue=0x21D8=5592
5592=24*233+0
$hexPid[2]=233=0xE9
$digitMapIndex=0

--------$j=1
$byteValue=0x078=120
120=24*5+0
$hexPid[1]=5=0x05
$digitMapIndex=0

--------$j=0
$byteValue=0x068=104
104=24*4+8
$hexPid[0]=4=0x04
$digitMapIndex=8
$ecodedChars[27]=M


$i=26

$hexPid= [0]=04 [1]=05 [2]=E9 [3]=63 [4]=DE [5]=75 [6]=B0 [7]=ED [8]=A6 [9]=BE [10]=25 [11]=B1 [12]=26 [13]=01 [14]=00