问如何使用PHPMailer发送包含CSS的超文本标记语言邮件？

EN

    $body = <<< YOUR_HTML_WITH_CSS_STYLE_TAGS
<html>
<head>
    <style>
        body * {width:1px;}
        #adiv {padding:2px;}
        .aclass {margin:3px;}
    </style>
</head>
<body>
    <div>
        some html
    </div>
    <div id="adiv">
        <p class="aclass">
        </p>
    </div>
</body>
</html>
YOUR_HTML_WITH_CSS_STYLE_TAGS;
    $doc = new DOMDocument();
    @$doc->loadHTML($body);
    $xpd = new DOMXPath($doc);
    0&&$node = new DOMElement();
    $result = $xpd->query('//img');
    foreach($result as $node){
        $attr = $node->getAttribute('src');
        $re = '/(http:\/\/.*?)?(\/.*+)/i';
        if(preg_match_all($re, $attr, $matches)){
            if(!empty($matches[1][0])&&0)
                continue;
            $attr = 'http://'.$_SERVER['HTTP_HOST'].$matches[2][0];
        }
        $node->setAttribute('src',$attr);
    }
    false&&$node=new DOMElement()&&$child=new DOMElement();
    $result = $xpd->query('//style/..');
    foreach($result as $node){
        foreach($node->childNodes as $child){
            if(strtolower($child->nodeName)=='style'){
                $node->removeChild($child);
                $css = $child->textContent;
                $re = '/(.*?)\{([^}]+)\}/';
                if(preg_match_all($re, $css, $matches)){
                    foreach($matches[1] as $idx=>$css_selector){
                        $css_text = $matches[2][$idx];
                        $css_text = preg_replace('/\s+/',' ',$css_text);
                        $css = new CSSQuery($doc);
                        foreach($css->query($css_selector) as $selected_node){
                            $style = $selected_node->getAttribute('style');
                            $selected_node->setAttribute('style', $style?$css_text:$style.';'.$css_text);
                        }
                    }
                }
            }
        }
    }
    $body = $doc->saveHTML();

<html>
<head>
</head>
<body>
    <div style="width:1px;">
        some html
    </div>
    <div id="adiv" style="width:1px;padding:2px;">
        <p class="aclass" style="width:1px;margin:3px;">
        </p>
    </div>
</body>
</html>