php - 显示“”字符而不是 “ ”

Question

我发现this thread很好地描述了我的问题，而this答案恰好描述了我的问题。

The non-breaking space character is byte 0xA0 is ISO-8859-1; when encoded to UTF-8 it'd be 0xC2,0xA0, which, if you (incorrectly) view it as ISO-8859-1 comes out as "Â ". That includes a trailing nbsp...

但是，我设法将问题归结为用于将图像标签包装在div中的函数。

function img_format($str)
{
    $doc = new DOMDocument();
    @$doc->loadHTML($str);     // <-- Bonus points for the explaination of the @

    // $tags object
    $tags = $doc->getElementsByTagName('img');

    foreach ($tags as $tag) {

        $div = $doc->createElement('div');
        $div->setAttribute('class','inner-copy');
        $tag->parentNode->insertBefore($div, $tag);
        $div->appendChild($tag);

        $tag->setAttribute('class', 'inner-img');
    }

    $str = $doc->saveHTML();

    return $str;
}

很简单，如何在此函数中解决此问题？

我了解使用；

<meta http-equiv="Content-Type" content="text/html;charset=utf-8" />

可以解决此问题，但是在函数本身中显然存在一些我忽略的问题。

我试过了;

$dom->validateOnParse = true;

无济于事。 (我也不知道该怎么做)

Answer 1

找到了!

@$doc->loadHTML(mb_convert_encoding($str, 'HTML-ENTITIES', 'UTF-8'));

This answer解释了这个问题并给出了上面的解决方法；

DOMDocument::loadHTML will treat your string as being in ISO-8859-1 unless you tell it otherwise. This results in UTF-8 strings being interpreted incorrectly.