有效的解决方案：base32编码在php

我正在寻找一个base32函数/类的PHP。我发现的不同类别和功能都非常无效。我跑了基准，得出如下结果：有效的解决方案：base32编码在php

10000 decodings：

base32：2.3273秒

的base64：0.0062秒

我所使用的base32类是：

http://www.php.net/manual/en/function.base-convert.php#102232

有什么办法比较简单吗？

我想使用base32的原因是它不区分大小写，因此我没有任何问题关于某些系统（例如电子邮件系统）上的url参数总是转换为小写字母。

如果你对小写编码有更好的选择，我也很想听听他们:-)。

最佳，

弗雷迪

来源

2013-05-07 Freddy

为Base32在PHP中，您可以在这里品尝我的实现：

https://github.com/ademarre/binary-to-text-php

在README文件从Base32例如复制：

// RFC 4648 base32 alphabet; case-insensitive 
$base32 = new Base2n(5, 'ABCDEFGHIJKLMNOPQRSTUVWXYZ234567', FALSE, TRUE, TRUE); 
$encoded = $base32->encode('encode this'); 
// MVXGG33EMUQHI2DJOM======

这并不慢，它可能会或可能不会不会比你测试的类更快，但它不会像内置的PHP函数那样快，比如base64_encode()。如果这对你来说非常重要，并且你不关心Base32编码，那么你应该使用十六进制。您可以使用原生PHP函数对十六进制进行编码，并且不区分大小写。

$encoded = bin2hex('encode this'); // 656e636f64652074686973 
$decoded = pack('H*', $encoded); // encode this 

// Alternatively, as of PHP 5.4... 
$decoded = hex2bin($encoded);  // encode this

十六进制的缺点是与Base32相比数据通货膨胀更多。十六进制将数据充满100％，而Base32则将数据充满约60％。

来源

2013-05-21 20:51:10

试试这个：https://github.com/bbars/utils/blob/master/php-base32-encode-decode/Base32.php

使用区分insesitive alpabet [0-9, a-v]和作品比Base2n(5)快：

size | Base32::encode | Base32::decode | $base2n->encode | $base2n->decode 
------------------------------------------------------------------------------- 
1  | 0.0000331401825 | 0.0000088214874 | 0.0002369880676 | 0.0001671314240 
2  | 0.0000050067902 | 0.0000040531158 | 0.0000100135803 | 0.0000081062317 
4  | 0.0000050067902 | 0.0000059604645 | 0.0000097751617 | 0.0000100135803 
8  | 0.0000078678131 | 0.0000100135803 | 0.0000131130219 | 0.0000140666962 
16  | 0.0000128746033 | 0.0000178813934 | 0.0000250339508 | 0.0000250339508 
32  | 0.0000238418579 | 0.0000319480896 | 0.0000441074371 | 0.0000472068787 
64  | 0.0001170635223 | 0.0000629425049 | 0.0000870227814 | 0.0000259876251 
128 | 0.0000879764557 | 0.0001208782196 | 0.0001959800720 | 0.0001759529114 
256 | 0.0001969337463 | 0.0002408027649 | 0.0004429817200 | 0.0003459453583 
512 | 0.0003631114960 | 0.0004880428314 | 0.0021460056305 | 0.0006039142609 
1024 | 0.0014970302582 | 0.0009729862213 | 0.0108621120453 | 0.0015850067139 
2048 | 0.0013530254364 | 0.0018491744995 | 0.0312080383301 | 0.0027630329132 
4096 | 0.0027470588684 | 0.0038080215454 | 0.1312029361725 | 0.0064430236816 
8192 | 0.0064270496368 | 0.0086290836334 | 0.5233020782471 | 0.0121779441833 
16384 | 0.0112588405609 | 0.0167109966278 | 2.0316259860992 | 0.0277659893036 
32768 | 0.0235319137573 | 0.0335960388184 | 11.6220989227295 | 0.0498571395874 
65536 | 0.0478749275208 | 0.0648550987244 |     |     
131072 | 0.1030550003052 | 0.1504058837891 |     |     
262144 | 0.1995100975037 | 0.2654621601105 |     |     
524288 | 0.3903131484985 | 0.5326008796692 |     |

来源

2016-02-29 15:30:08 Bars

这不是base32，这是base32hex。 base32使用所有字母并关闭0和1，因此只使用2到7作为数字并以字母开头。 – My1 2017-09-12 07:55:37

您可以尝试这些功能我改编自bbars和crockford：

function crockford32_encode($data) { 
    $chars = 'abcdefghjkmnpqrstvwxyz'; 
    $mask = 0b11111; 

    $dataSize = strlen($data); 
    $res = ''; 
    $remainder = 0; 
    $remainderSize = 0; 

    for($i = 0; $i < $dataSize; $i++) { 
     $b = ord($data[$i]); 
     $remainder = ($remainder << 8) | $b; 
     $remainderSize += 8; 
     while($remainderSize > 4) { 
      $remainderSize -= 5; 
      $c = $remainder & ($mask << $remainderSize); 
      $c >>= $remainderSize; 
      $res .= $chars[$c]; 
     } 
    } 
    if($remainderSize > 0) { 
     $remainder <<= (5 - $remainderSize); 
     $c = $remainder & $mask; 
     $res .= $chars[$c]; 
    } 

    return $res; 
} 

function crockford32_decode($data) { 
    $map = [ 
     '0' => 0, 
     'O' => 0, 
     'o' => 0, 
     '1' => 1, 
     'I' => 1, 
     'i' => 1, 
     'L' => 1, 
     'l' => 1, 
     '2' => 2, 
     '3' => 3, 
     '4' => 4, 
     '5' => 5, 
     '6' => 6, 
     '7' => 7, 
     '8' => 8, 
     '9' => 9, 
     'A' => 10, 
     'a' => 10, 
     'B' => 11, 
     'b' => 11, 
     'C' => 12, 
     'c' => 12, 
     'D' => 13, 
     'd' => 13, 
     'E' => 14, 
     'e' => 14, 
     'F' => 15, 
     'f' => 15, 
     'G' => 16, 
     'g' => 16, 
     'H' => 17, 
     'h' => 17, 
     'J' => 18, 
     'j' => 18, 
     'K' => 19, 
     'k' => 19, 
     'M' => 20, 
     'm' => 20, 
     'N' => 21, 
     'n' => 21, 
     'P' => 22, 
     'p' => 22, 
     'Q' => 23, 
     'q' => 23, 
     'R' => 24, 
     'r' => 24, 
     'S' => 25, 
     's' => 25, 
     'T' => 26, 
     't' => 26, 
     'V' => 27, 
     'v' => 27, 
     'W' => 28, 
     'w' => 28, 
     'X' => 29, 
     'x' => 29, 
     'Y' => 30, 
     'y' => 30, 
     'Z' => 31, 
     'z' => 31, 
    ]; 

    $data = strtolower($data); 
    $dataSize = strlen($data); 
    $buf = 0; 
    $bufSize = 0; 
    $res = ''; 

    for($i = 0; $i < $dataSize; $i++) { 
     $c = $data[$i]; 
     if(!isset($map[$c])) { 
      throw new \Exception("Unsupported character $c (0x".bin2hex($c).") at position $i"); 
     } 
     $b = $map[$c]; 
     $buf = ($buf << 5) | $b; 
     $bufSize += 5; 
     if($bufSize > 7) { 
      $bufSize -= 8; 
      $b = ($buf & (0xff << $bufSize)) >> $bufSize; 
      $res .= chr($b); 
     } 
    } 

    return $res; 
}

来源

2016-03-21 21:18:54 mpen

有效的解决方案：base32编码在php

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