php - 如何在PHP中获取包含组合字符的Unicode字符串的 "rendered length"？

Question

考虑到并非所有 unicode 组合字符都有等效的预组合字符 (NFC)，如果这可能/在语义上有意义，是否有办法使用 PHP 获取字符串的“呈现”长度？

http://3v4l.org/L1kPl (使用 php7 转义语法)

<?php
echo $s = "\u{0071}\u{0307}\u{0323}";
echo "\n";
echo mb_strlen(Normalizer::normalize($s, Normalizer::FORM_C), "UTF-8");
// Shows 3 because there is no precomposed equivalent
// for such glyph. I want to get 1 instead

到目前为止我取得的成就:http://3v4l.org/4NSCi

<?php
echo $s = "\u{0071}\u{0307}\u{0323}";
$r = Normalizer::normalize($s, Normalizer::FORM_C);
echo mb_strlen(preg_replace("@\p{Mn}@u", "", $r), "UTF-8");

Answer 1

您可能正在寻找:

grapheme_strlen()

它需要一个参数，该参数必须是有效的 utf-8 字符串。 这是引用:Graphme cluster boundaries