javascript - php的输出字节数组差异版本

Question

我正在使用一个将字符串转录成字节数组的函数，我在 PHP 和 JavaScript 中都有这个函数，但是当我播放这些字符时它们有不同的行为:㬁欲膘ƘჀ䚐⦀飠喔&ӡ๨㏃桩쌌䌠

如何使结果相同？

我的代码:

function bytesFromWords($string) {
    $bytes = array();
    $j = strlen($string);

    for($i = 0; $i < $j; $i++) {
        $char = ord(mb_substr($string, $i, 1));
        $bytes[] = $char >> 8;
        $bytes[] = $char & 0xFF;
    }
    return $bytes;
}
echo bytesFromWords('㬁愃膘ƘჀ䚐⦀飠噋&ӡ๨㏃棱쌌ص䌠'); // result: 0,227,0,172,0,129,0,230,0,132,0,131,0,232,0,134,0,152,0,198,0,152,0,225,0,131,0,128,0,228,0,154,0,144,0,226,0,166,0,128,0,233,0,163,0,160,0,229,0,153,0,139,0,38,0,211,0,161,0,224,0,185,0,168,0,227,0,143,0,131,0,230,0,163,0,177,0,236,0,140,0,140,0,216,0,181,0,228,0,140,0,160


function bytesFromWords (string) {
    var bytes = [];
    for(var i = 0; i < string.length; i++) {
        var char = string.charCodeAt(i);
        bytes.push(char >>> 8);
        bytes.push(char & 0xFF);
    }
    return bytes;
}
console.log(bytesFromWords('㬁愃膘ƘჀ䚐⦀飠噋&ӡ๨㏃棱쌌ص䌠').toString()); // result: 59,1,97,3,129,152,1,152,16,192,70,144,41,128,152,224,86,75,0,38,4,225,14,104,51,195,104,241,195,12,6,53,67,32

Answer 1

问题:

• strlen不按预期计算 Unicode 字符数。
• ord无法按预期使用 unicode。
• chr无法按预期使用 unicode。

strlen 有问题

'㬁愃膘ƘჀ䚐⦀飠噋&ӡ๨㏃棱쌌ص䌠'.length返回 17 和 strlen('㬁愃膘ƘჀ䚐⦀飠噋&ӡ๨㏃棱쌌ص䌠')返回 46，要修复它，请使用:

$j = preg_match_all('/.{1}/us', $string, $data);

ord 有问题

使用 '㬁'.charCodeAt(0)返回 15105 和 ord('㬁')返回 227，用于固定用途:

function unicode_ord($char) {
    list(, $ord) = unpack('N', mb_convert_encoding($char, 'UCS-4BE', 'UTF-8'));
    return $ord;
}

_{来源:https://stackoverflow.com/a/10333307/1518921}

chr 有问题

使用 String.fromCharCode(15104)返回 㬁和 chr(15104)返回空/空白，用于修复:

function unicode_chr($u) {
    return mb_convert_encoding('&#' . intval($u) . ';', 'UTF-8', 'HTML-ENTITIES');
}

_{来源:https://stackoverflow.com/a/9878531/1518921}

---

完整代码:

<?php
function unicode_ord($char) {
    list(, $ord) = unpack('N', mb_convert_encoding($char, 'UCS-4BE', 'UTF-8'));
    return $ord;
}

function unicode_chr($u) {
    return mb_convert_encoding('&#' . intval($u) . ';', 'UTF-8', 'HTML-ENTITIES');
}

function bytesToWords($bytes) {
    $str = '';
    $j = count($bytes);

    for($i = 0; $i < $j; $i += 2) {
        $char = $bytes[$i] << 8;
        if ($bytes[$i + 1]) {
            $char |= $bytes[$i + 1];
        }
        $str .= unicode_chr($char);
    }
    return $str;
}

function bytesFromWords($string) {
    $bytes = array();
    $j = preg_match_all('/.{1}/us', $string, $data);
    $data = $data[0];

    foreach ($data as $char) {
        $char = unicode_ord($char);
        $bytes[] = $char >> 8;
        $bytes[] = $char & 0xFF;
    }
    return $bytes;
}


$data = bytesFromWords('㬁愃膘ƘჀ䚐⦀飠噋&ӡ๨㏃棱쌌ص䌠');

echo implode(', ', $data), '<br>';
echo bytesToWords($data);