如何在字符串中用空格填充每个多字节字符/表情符号？

Question

我想用两边的空格填充每个多字节字符。我可以把它们剥下来就好了，但我想把它们留在里面，然后把它们垫起来。

例如：</code>到<code> .

使用下划线表示空格：</code>到<code>______

Answer 1

我发现 this function 有人在 PHP 文档中添加了将多字节字符串拆分为字符数组（如 str_split）并对其进行了修改。

function addSpaces($string) {
    $strlen = mb_strlen($string);
    $new_string = '';
    while ($strlen) {
        $char = mb_substr($string,0,1,"UTF-8");
        if (strlen($char) > 1) {
            $new_string .= " $char ";
        } else {
            $new_string .= $char;
        }
        $string = mb_substr($string,1,$strlen,"UTF-8");
        $strlen = mb_strlen($string);
    }
    return $new_string;
}

This question 还有其他方法可以进行类似修改的拆分。修改是，如果其中一个拆分字符的strlen大于1，那么它是多字节的，所以添加空格。

Answer 2

使用这个怪物-already-cooked regex:

$regex = "[\x{fe00}-\x{fe0f}\x{2712}\x{2714}\x{2716}\x{271d}\x{2721}\x{2728}\x{2733}\x{2734}\x{2744}\x{2747}\x{274c}\x{274e}\x{2753}-\x{2755}\x{2757}\x{2763}\x{2764}\x{2795}-\x{2797}\x{27a1}\x{27b0}\x{27bf}\x{2934}\x{2935}\x{2b05}-\x{2b07}\x{2b1b}\x{2b1c}\x{2b50}\x{2b55}\x{3030}\x{303d}\x{1f004}\x{1f0cf}\x{1f170}\x{1f171}\x{1f17e}\x{1f17f}\x{1f18e}\x{1f191}-\x{1f19a}\x{1f201}\x{1f202}\x{1f21a}\x{1f22f}\x{1f232}-\x{1f23a}\x{1f250}\x{1f251}\x{1f300}-\x{1f321}\x{1f324}-\x{1f393}\x{1f396}\x{1f397}\x{1f399}-\x{1f39b}\x{1f39e}-\x{1f3f0}\x{1f3f3}-\x{1f3f5}\x{1f3f7}-\x{1f4fd}\x{1f4ff}-\x{1f53d}\x{1f549}-\x{1f54e}\x{1f550}-\x{1f567}\x{1f56f}\x{1f570}\x{1f573}-\x{1f579}\x{1f587}\x{1f58a}-\x{1f58d}\x{1f590}\x{1f595}\x{1f596}\x{1f5a5}\x{1f5a8}\x{1f5b1}\x{1f5b2}\x{1f5bc}\x{1f5c2}-\x{1f5c4}\x{1f5d1}-\x{1f5d3}\x{1f5dc}-\x{1f5de}\x{1f5e1}\x{1f5e3}\x{1f5ef}\x{1f5f3}\x{1f5fa}-\x{1f64f}\x{1f680}-\x{1f6c5}\x{1f6cb}-\x{1f6d0}\x{1f6e0}-\x{1f6e5}\x{1f6e9}\x{1f6eb}\x{1f6ec}\x{1f6f0}\x{1f6f3}\x{1f910}-\x{1f918}\x{1f980}-\x{1f984}\x{1f9c0}\x{3297}\x{3299}\x{a9}\x{ae}\x{203c}\x{2049}\x{2122}\x{2139}\x{2194}-\x{2199}\x{21a9}\x{21aa}\x{231a}\x{231b}\x{2328}\x{2388}\x{23cf}\x{23e9}-\x{23f3}\x{23f8}-\x{23fa}\x{24c2}\x{25aa}\x{25ab}\x{25b6}\x{25c0}\x{25fb}-\x{25fe}\x{2600}-\x{2604}\x{260e}\x{2611}\x{2614}\x{2615}\x{2618}\x{261d}\x{2620}\x{2622}\x{2623}\x{2626}\x{262a}\x{262e}\x{262f}\x{2638}-\x{263a}\x{2648}-\x{2653}\x{2660}\x{2663}\x{2665}\x{2666}\x{2668}\x{267b}\x{267f}\x{2692}-\x{2694}\x{2696}\x{2697}\x{2699}\x{269b}\x{269c}\x{26a0}\x{26a1}\x{26aa}\x{26ab}\x{26b0}\x{26b1}\x{26bd}\x{26be}\x{26c4}\x{26c5}\x{26c8}\x{26ce}\x{26cf}\x{26d1}\x{26d3}\x{26d4}\x{26e9}\x{26ea}\x{26f0}-\x{26f5}\x{26f7}-\x{26fa}\x{26fd}\x{2702}\x{2705}\x{2708}-\x{270d}\x{270f}]|\x{23}\x{20e3}|\x{2a}\x{20e3}|\x{30}\x{20e3}|\x{31}\x{20e3}|\x{32}\x{20e3}|\x{33}\x{20e3}|\x{34}\x{20e3}|\x{35}\x{20e3}|\x{36}\x{20e3}|\x{37}\x{20e3}|\x{38}\x{20e3}|\x{39}\x{20e3}|\x{1f1e6}[\x{1f1e8}-\x{1f1ec}\x{1f1ee}\x{1f1f1}\x{1f1f2}\x{1f1f4}\x{1f1f6}-\x{1f1fa}\x{1f1fc}\x{1f1fd}\x{1f1ff}]|\x{1f1e7}[\x{1f1e6}\x{1f1e7}\x{1f1e9}-\x{1f1ef}\x{1f1f1}-\x{1f1f4}\x{1f1f6}-\x{1f1f9}\x{1f1fb}\x{1f1fc}\x{1f1fe}\x{1f1ff}]|\x{1f1e8}[\x{1f1e6}\x{1f1e8}\x{1f1e9}\x{1f1eb}-\x{1f1ee}\x{1f1f0}-\x{1f1f5}\x{1f1f7}\x{1f1fa}-\x{1f1ff}]|\x{1f1e9}[\x{1f1ea}\x{1f1ec}\x{1f1ef}\x{1f1f0}\x{1f1f2}\x{1f1f4}\x{1f1ff}]|\x{1f1ea}[\x{1f1e6}\x{1f1e8}\x{1f1ea}\x{1f1ec}\x{1f1ed}\x{1f1f7}-\x{1f1fa}]|\x{1f1eb}[\x{1f1ee}-\x{1f1f0}\x{1f1f2}\x{1f1f4}\x{1f1f7}]|\x{1f1ec}[\x{1f1e6}\x{1f1e7}\x{1f1e9}-\x{1f1ee}\x{1f1f1}-\x{1f1f3}\x{1f1f5}-\x{1f1fa}\x{1f1fc}\x{1f1fe}]|\x{1f1ed}[\x{1f1f0}\x{1f1f2}\x{1f1f3}\x{1f1f7}\x{1f1f9}\x{1f1fa}]|\x{1f1ee}[\x{1f1e8}-\x{1f1ea}\x{1f1f1}-\x{1f1f4}\x{1f1f6}-\x{1f1f9}]|\x{1f1ef}[\x{1f1ea}\x{1f1f2}\x{1f1f4}\x{1f1f5}]|\x{1f1f0}[\x{1f1ea}\x{1f1ec}-\x{1f1ee}\x{1f1f2}\x{1f1f3}\x{1f1f5}\x{1f1f7}\x{1f1fc}\x{1f1fe}\x{1f1ff}]|\x{1f1f1}[\x{1f1e6}-\x{1f1e8}\x{1f1ee}\x{1f1f0}\x{1f1f7}-\x{1f1fb}\x{1f1fe}]|\x{1f1f2}[\x{1f1e6}\x{1f1e8}-\x{1f1ed}\x{1f1f0}-\x{1f1ff}]|\x{1f1f3}[\x{1f1e6}\x{1f1e8}\x{1f1ea}-\x{1f1ec}\x{1f1ee}\x{1f1f1}\x{1f1f4}\x{1f1f5}\x{1f1f7}\x{1f1fa}\x{1f1ff}]|\x{1f1f4}\x{1f1f2}|\x{1f1f5}[\x{1f1e6}\x{1f1ea}-\x{1f1ed}\x{1f1f0}-\x{1f1f3}\x{1f1f7}-\x{1f1f9}\x{1f1fc}\x{1f1fe}]|\x{1f1f6}\x{1f1e6}|\x{1f1f7}[\x{1f1ea}\x{1f1f4}\x{1f1f8}\x{1f1fa}\x{1f1fc}]|\x{1f1f8}[\x{1f1e6}-\x{1f1ea}\x{1f1ec}-\x{1f1f4}\x{1f1f7}-\x{1f1f9}\x{1f1fb}\x{1f1fd}-\x{1f1ff}]|\x{1f1f9}[\x{1f1e6}\x{1f1e8}\x{1f1e9}\x{1f1eb}-\x{1f1ed}\x{1f1ef}-\x{1f1f4}\x{1f1f7}\x{1f1f9}\x{1f1fb}\x{1f1fc}\x{1f1ff}]|\x{1f1fa}[\x{1f1e6}\x{1f1ec}\x{1f1f2}\x{1f1f8}\x{1f1fe}\x{1f1ff}]|\x{1f1fb}[\x{1f1e6}\x{1f1e8}\x{1f1ea}\x{1f1ec}\x{1f1ee}\x{1f1f3}\x{1f1fa}]|\x{1f1fc}[\x{1f1eb}\x{1f1f8}]|\x{1f1fd}\x{1f1f0}|\x{1f1fe}[\x{1f1ea}\x{1f1f9}]|\x{1f1ff}[\x{1f1e6}\x{1f1f2}\x{1f1fc}]";

里面一个preg_replace_callback():

var_dump(preg_replace_callback("@$regex@u", function($match) {
    return $match[0]."  ";
}, ''));

输出：

string(18) "      "

Live demo

Answer 3

简单的正则表达式替换也可以...

mb_regex_encoding("UTF-8");

echo mb_ereg_replace(
    '([^\p{L}\s])',
    ' \1 ', 
    'text  other text '
);

输出：text other text

function pad_emojis($string) {
    $default_encoding = mb_regex_encoding();
    mb_regex_encoding("UTF-8");
    $string = mb_ereg_replace('([^\p{L}\s])', ' \1 ', $string);
    mb_regex_encoding($default_encoding);
    return $string;
}

如何在字符串中用空格填充每个多字节字符/表情符号？

How can I pad each multibyte character / emoji with spaces around it in a string?

php

regex

multibyte

emoji

emojione