php str_split()每n个带有重音符号的字符

问题描述

我有这段代码可以每3个字符分割一个字符串，效果很好，但是口音很混乱:

I've this code to split a string every 3 characters, works fine, but accents are messed:

$splitted_array = str_split('waderòrò',3);

但它输出

print_r($splitted_array ); >> Array ( [0] => wad [1] => er▯ [2] => ▯r▯ [3] => ▯ )

我知道已经问过类似的问题，但是这个问题并没有帮助我. ucwords和法语重音字母编码.我确实尝试了mb_split，但没有成功，因为我找不到正确的正则表达式...正确的代码是什么?

I know similar question was already asked, but this question didn't help me. ucwords and french accented lettres encoding. I did try mb_split, but without success, because I wasn't able to find the right regex... What would be the right code?

推荐答案

用户"veszelovszki at gmail dot com"在PHP str_split手册页上发布了以下解决方案.这是str_split()函数的多字节安全变体.

User "veszelovszki at gmail dot com" posted the below solution to the PHP str_split manual page. It is a multibyte-safe variation of the str_split() function.

function mb_str_split($string, $split_length = 1)
{
    if ($split_length == 1) {
        return preg_split("//u", $string, -1, PREG_SPLIT_NO_EMPTY);
    } elseif ($split_length > 1) {
        $return_value = [];
        $string_length = mb_strlen($string, "UTF-8");
        for ($i = 0; $i < $string_length; $i += $split_length) {
            $return_value[] = mb_substr($string, $i, $split_length, "UTF-8");
        }
        return $return_value;
    } else {
        return false;
    }
}

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