如何将 Unicode 特殊字符转换为 html 个实体?

How do I convert Unicode special characters to html entities?

我有以下字符串:

$string = "★ This is some text ★";

我想将其转换为 html 个实体:

$string = "★ This is some text ★";

每个人都在写的解决方案:

htmlentities("★ This is some text ★", "UTF-8");

但是 html 实体无法将所有 unicode 转换为 html 实体。所以它只给我与输入相同的输出:

★ This is some text ★

我还尝试将此解决方案与以下两者结合使用:

header('Content-Type: text/plain; charset=utf-8');

和:

mb_convert_encoding();

但这要么打印出空结果,要么根本不转换,要么错误地将星星转换为:

Â

如何将 ★ 和所有其他 unicode 字符转换为正确的 html 实体?

htmlentities 在这种情况下不起作用,但您可以尝试 UCS-4 对字符串进行编码,例如:

$string = "★ This is some text ★";
$entity = preg_replace_callback('/[\x{80}-\x{10FFFF}]/u', function ($m) {
    $char = current($m);
    $utf = iconv('UTF-8', 'UCS-4', $char);
    return sprintf("&#x%s;", ltrim(strtoupper(bin2hex($utf)), "0"));
}, $string);
echo $entity;

★ This is some text ★

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