PHP：将unicode代码点转换为UTF-8

Question

我的数据格式为：U+597D或类似U+6211。我想将它们转换为UTF-8（原始字符是好和我）。我该怎么办？

Answer 1

$utf8string = html_entity_decode(preg_replace("/U\+([0-9A-F]{4})/", "&#x\\1;", $string), ENT_NOQUOTES, 'UTF-8');

可能是最简单的解决方案。

Answer 2

function utf8($num)
{
    if($num<=0x7F)       return chr($num);
    if($num<=0x7FF)      return chr(($num>>6)+192).chr(($num&63)+128);
    if($num<=0xFFFF)     return chr(($num>>12)+224).chr((($num>>6)&63)+128).chr(($num&63)+128);
    if($num<=0x1FFFFF)   return chr(($num>>18)+240).chr((($num>>12)&63)+128).chr((($num>>6)&63)+128).chr(($num&63)+128);
    return '';
}

function uniord($c)
{
    $ord0 = ord($c{0}); if ($ord0>=0   && $ord0<=127) return $ord0;
    $ord1 = ord($c{1}); if ($ord0>=192 && $ord0<=223) return ($ord0-192)*64 + ($ord1-128);
    $ord2 = ord($c{2}); if ($ord0>=224 && $ord0<=239) return ($ord0-224)*4096 + ($ord1-128)*64 + ($ord2-128);
    $ord3 = ord($c{3}); if ($ord0>=240 && $ord0<=247) return ($ord0-240)*262144 + ($ord1-128)*4096 + ($ord2-128)*64 + ($ord3-128);
    return false;
}

utf8（）和uniord（）尝试镜像php上的chr（）和ord（）函数：

echo utf8(0x6211)."\n";
echo uniord(utf8(0x6211))."\n";
echo "U+".dechex(uniord(utf8(0x6211)))."\n";

//In your case:
$wo='U+6211';
$hao='U+597D';
echo utf8(hexdec(str_replace("U+","", $wo)))."\n";
echo utf8(hexdec(str_replace("U+","", $hao)))."\n";

输出：

我
25105
U+6211
我
好

Answer 3

我刚为polyfill和ord缺少多字节版本写了chr，并注意以下几点：

• 仅当函数mb_ord和mb_chr尚不存在时才定义它们。如果它们确实存在于您的框架或PHP的未来版本中，则将忽略polyfill。

• 它使用广泛使用的mbstring扩展程序进行转换。如果未加载mbstring扩展程序，则会使用iconv扩展名。

我还为HTML实体编码/解码和编码/解码添加了JSON格式的函数，以及一些如何使用这些函数的演示代码

---

代码

if (!function_exists('codepoint_encode')) {
    function codepoint_encode($str) {
        return substr(json_encode($str), 1, -1);
    }
}

if (!function_exists('codepoint_decode')) {
    function codepoint_decode($str) {
        return json_decode(sprintf('"%s"', $str));
    }
}

if (!function_exists('mb_internal_encoding')) {
    function mb_internal_encoding($encoding = NULL) {
        return ($from_encoding === NULL) ? iconv_get_encoding() : iconv_set_encoding($encoding);
    }
}

if (!function_exists('mb_convert_encoding')) {
    function mb_convert_encoding($str, $to_encoding, $from_encoding = NULL) {
        return iconv(($from_encoding === NULL) ? mb_internal_encoding() : $from_encoding, $to_encoding, $str);
    }
}

if (!function_exists('mb_chr')) {
    function mb_chr($ord, $encoding = 'UTF-8') {
        if ($encoding === 'UCS-4BE') {
            return pack("N", $ord);
        } else {
            return mb_convert_encoding(mb_chr($ord, 'UCS-4BE'), $encoding, 'UCS-4BE');
        }
    }
}

if (!function_exists('mb_ord')) {
    function mb_ord($char, $encoding = 'UTF-8') {
        if ($encoding === 'UCS-4BE') {
            list(, $ord) = (strlen($char) === 4) ? @unpack('N', $char) : @unpack('n', $char);
            return $ord;
        } else {
            return mb_ord(mb_convert_encoding($char, 'UCS-4BE', $encoding), 'UCS-4BE');
        }
    }
}

if (!function_exists('mb_htmlentities')) {
    function mb_htmlentities($string, $hex = true, $encoding = 'UTF-8') {
        return preg_replace_callback('/[\x{80}-\x{10FFFF}]/u', function ($match) use ($hex) {
            return sprintf($hex ? '&#x%X;' : '&#%d;', mb_ord($match[0]));
        }, $string);
    }
}

if (!function_exists('mb_html_entity_decode')) {
    function mb_html_entity_decode($string, $flags = null, $encoding = 'UTF-8') {
        return html_entity_decode($string, ($flags === NULL) ? ENT_COMPAT | ENT_HTML401 : $flags, $encoding);
    }
}

如何使用

echo "\nGet string from numeric DEC value\n";
var_dump(mb_chr(25105));
var_dump(mb_chr(22909));

echo "\nGet string from numeric HEX value\n";
var_dump(mb_chr(0x6211));
var_dump(mb_chr(0x597D));

echo "\nGet numeric value of character as DEC int\n";
var_dump(mb_ord('我'));
var_dump(mb_ord('好'));

echo "\nGet numeric value of character as HEX string\n";
var_dump(dechex(mb_ord('我')));
var_dump(dechex(mb_ord('好')));

echo "\nEncode / decode to DEC based HTML entities\n";
var_dump(mb_htmlentities('我好', false));
var_dump(mb_html_entity_decode('我好'));

echo "\nEncode / decode to HEX based HTML entities\n";
var_dump(mb_htmlentities('我好'));
var_dump(mb_html_entity_decode('我好'));

echo "\nUse JSON encoding / decoding\n";
var_dump(codepoint_encode("我好"));
var_dump(codepoint_decode('\u6211\u597d'));

输出

Get string from numeric DEC value
string(3) "我"
string(3) "好"

Get string from numeric HEX value
string(3) "我"
string(3) "好"

Get numeric value of character as DEC string
int(25105)
int(22909)

Get numeric value of character as HEX string
string(4) "6211"
string(4) "597d"

Encode / decode to DEC based HTML entities
string(16) "我好"
string(6) "我好"

Encode / decode to HEX based HTML entities
string(16) "我好"
string(6) "我好"

Use JSON encoding / decoding
string(12) "\u6211\u597d"
string(6) "我好"

Answer 4

PHP 7 +

从PHP 7开始，您可以使用Unicode codepoint escape syntax执行此操作。

echo "\u{597D}";输出好。

Answer 5

mb_convert_encoding(
    preg_replace("/U\+([0-9A-F]*)/"
        ,"&#x\\1;"
        ,'U+597DU+6211'
    )
    ,"UTF-8"
    ,"HTML-ENTITIES"
);

也很好。

Answer 6

借助下表：

http://en.wikipedia.org/wiki/UTF-8#Description

不能简单：）

只需根据它们适合的范围屏蔽unicode数字。

Answer 7

我处于需要过滤特定字符而不影响html的位置，因为我使用的是wysiwig编辑器，但是人们从word中复制粘贴会在内容中添加一些不可理解的字符。

我的解决方案归结为简单的替换列表。

class ReplaceIllegal {
    public static $find = array ( 0 => '\x0', 1 => '\x1', 2 => '\x2', 3 => '\x3', 4 => '\x4', 5 => '\x5', 6 => '\x6', 7 => '\x7', 8 => '\x8', 9 => '\x9', 10 => '\xA', 11 => '\xB', 12 => '\xC', 13 => '\xD', 14 => '\xE', 15 => '\xF', 16 => '\x10', 17 => '\x11', 18 => '\x12', 19 => '\x13', 20 => '\x14', 21 => '\x15', 22 => '\x16', 23 => '\x17', 24 => '\x18', 25 => '\x19', 26 => '\x1A', 27 => '\x1B', 28 => '\x1C', 29 => '\x1D', 30 => '\x1E', 31 => '\x80', 32 => '\x81', 33 => '\x82', 34 => '\x83', 35 => '\x84', 36 => '\x85', 37 => '\x86', 38 => '\x87', 39 => '\x88', 40 => '\x89', 41 => '\x8A', 42 => '\x8B', 43 => '\x8C', 44 => '\x8D', 45 => '\x8E', 46 => '\x8F', 47 => '\x90', 48 => '\x91', 49 => '\x92', 50 => '\x93', 51 => '\x94', 52 => '\x95', 53 => '\x96', 54 => '\x97', 55 => '\x98', 56 => '\x99', 57 => '\x9A', 58 => '\x9B', 59 => '\x9C', 60 => '\x9D', 61 => '\x9E', 62 => '\x9F', 63 => '\xA0', 64 => '\xA1', 65 => '\xA2', 66 => '\xA3', 67 => '\xA4', 68 => '\xA5', 69 => '\xA6', 70 => '\xA7', 71 => '\xA8', 72 => '\xA9', 73 => '\xAA', 74 => '\xAB', 75 => '\xAC', 76 => '\xAD', 77 => '\xAE', 78 => '\xAF', 79 => '\xB0', 80 => '\xB1', 81 => '\xB2', 82 => '\xB3', 83 => '\xB4', 84 => '\xB5', 85 => '\xB6', 86 => '\xB7', 87 => '\xB8', 88 => '\xB9', 89 => '\xBA', 90 => '\xBB', 91 => '\xBC', 92 => '\xBD', 93 => '\xBE', 94 => '\xBF', 95 => '\xC0', 96 => '\xC1', 97 => '\xC2', 98 => '\xC3', 99 => '\xC4', 100 => '\xC5', 101 => '\xC6', 102 => '\xC7', 103 => '\xC8', 104 => '\xC9', 105 => '\xCA', 106 => '\xCB', 107 => '\xCC', 108 => '\xCD', 109 => '\xCE', 110 => '\xCF', 111 => '\xD0', 112 => '\xD1', 113 => '\xD2', 114 => '\xD3', 115 => '\xD4', 116 => '\xD5', 117 => '\xD6', 118 => '\xD7', 119 => '\xD8', 120 => '\xD9', 121 => '\xDA', 122 => '\xDB', 123 => '\xDC', 124 => '\xDD', 125 => '\xDE', 126 => '\xDF', 127 => '\xE0', 128 => '\xE1', 129 => '\xE2', 130 => '\xE3', 131 => '\xE4', 132 => '\xE5', 133 => '\xE6', 134 => '\xE7', 135 => '\xE8', 136 => '\xE9', 137 => '\xEA', 138 => '\xEB', 139 => '\xEC', 140 => '\xED', 141 => '\xEE', 142 => '\xEF', 143 => '\xF0', 144 => '\xF1', 145 => '\xF2', 146 => '\xF3', 147 => '\xF4', 148 => '\xF5', 149 => '\xF6', 150 => '\xF7', 151 => '\xF8', 152 => '\xF9', 153 => '\xFA', 154 => '\xFB', 155 => '\xFC', 156 => '\xFD', 157 => '\xFE', );
    private static $replace = array ( 0 => '�', 1 => '', 2 => '', 3 => '', 4 => '', 5 => '', 6 => '', 7 => '', 8 => '', 9 => '	', 10 => '
', 11 => '', 12 => '', 13 => '
', 14 => '', 15 => '', 16 => '', 17 => '', 18 => '', 19 => '', 20 => '', 21 => '', 22 => '', 23 => '', 24 => '', 25 => '', 26 => '', 27 => '', 28 => '', 29 => '', 30 => '', 31 => '€', 32 => '', 33 => '‚', 34 => 'ƒ', 35 => '„', 36 => '…', 37 => '†', 38 => '‡', 39 => 'ˆ', 40 => '‰', 41 => 'Š', 42 => '‹', 43 => 'Œ', 44 => '', 45 => 'Ž', 46 => '', 47 => '', 48 => '‘', 49 => '’', 50 => '“', 51 => '”', 52 => '•', 53 => '–', 54 => '—', 55 => '˜', 56 => '™', 57 => 'š', 58 => '›', 59 => 'œ', 60 => '', 61 => 'ž', 62 => 'Ÿ', 63 => ' ', 64 => '¡', 65 => '¢', 66 => '£', 67 => '¤', 68 => '¥', 69 => '¦', 70 => '§', 71 => '¨', 72 => '©', 73 => 'ª', 74 => '«', 75 => '¬', 76 => '­', 77 => '®', 78 => '¯', 79 => '°', 80 => '±', 81 => '²', 82 => '³', 83 => '´', 84 => 'µ', 85 => '¶', 86 => '·', 87 => '¸', 88 => '¹', 89 => 'º', 90 => '»', 91 => '¼', 92 => '½', 93 => '¾', 94 => '¿', 95 => 'À', 96 => 'Á', 97 => 'Â', 98 => 'Ã', 99 => 'Ä', 100 => 'Å', 101 => 'Æ', 102 => 'Ç', 103 => 'È', 104 => 'É', 105 => 'Ê', 106 => 'Ë', 107 => 'Ì', 108 => 'Í', 109 => 'Î', 110 => 'Ï', 111 => 'Ð', 112 => 'Ñ', 113 => 'Ò', 114 => 'Ó', 115 => 'Ô', 116 => 'Õ', 117 => 'Ö', 118 => '×', 119 => 'Ø', 120 => 'Ù', 121 => 'Ú', 122 => 'Û', 123 => 'Ü', 124 => 'Ý', 125 => 'Þ', 126 => 'ß', 127 => 'à', 128 => 'á', 129 => 'â', 130 => 'ã', 131 => 'ä', 132 => 'å', 133 => 'æ', 134 => 'ç', 135 => 'è', 136 => 'é', 137 => 'ê', 138 => 'ë', 139 => 'ì', 140 => 'í', 141 => 'î', 142 => 'ï', 143 => 'ð', 144 => 'ñ', 145 => 'ò', 146 => 'ó', 147 => 'ô', 148 => 'õ', 149 => 'ö', 150 => '÷', 151 => 'ø', 152 => 'ù', 153 => 'ú', 154 => 'û', 155 => 'ü', 156 => 'ý', 157 => 'þ', );

    /* 
     * replace illegal characters for escaped html character but don't touch anything else.  
     */
    public static function getSaveValue($value) {       
        return str_replace(self::$find, self::$replace, $value);
    }
    public static function makeIllegal($find,$replace) {
        self::$find[] = $find;
        self::$replace[] = $replace;
    }
}

Answer 8

<?php

function chr_utf8($n,$f='C*'){
return $n<(1<<7)?chr($n):($n<1<<11?pack($f,192|$n>>6,1<<7|191&$n):
($n<(1<<16)?pack($f,224|$n>>12,1<<7|63&$n>>6,1<<7|63&$n):
($n<(1<<20|1<<16)?pack($f,240|$n>>18,1<<7|63&$n>>12,1<<7|63&$n>>6,1<<7|63&$n):'')));
}

$your_input='U+597D';

echo (chr_utf8(hexdec(ltrim($your_input,'U+'))));

// Output 好

如果您想使用回调功能，可以试试：

<?php

// Note: function chr_utf8 shown above is required

$your_input='U+597DU+6211';

$result=preg_replace_callback('#U\+([a-f0-9]+)#i',function($a){return chr_utf8(hexdec($a[1]));},$your_input);

echo $result;

// Output 好我

在https://eval.in/748187

中查看

Answer 9

这对我来说很好。如果你有一个字母“Letters u00e1 u00e9等”替换为“Lettersáé”。

function unicode2html($str){
    // Set the locale to something that's UTF-8 capable
    setlocale(LC_ALL, 'en_US.UTF-8');
    // Convert the codepoints to entities
    $str = preg_replace("/u([0-9a-fA-F]{4})/", "&#x\\1;", $str);
    // Convert the entities to a UTF-8 string
    return iconv("UTF-8", "ISO-8859-1//TRANSLIT", $str);
}