Question

我有这个代码

function innerHTML($element) 
{ 
    $innerHTML = ''; 
    $children = $element -> childNodes; 
    foreach ((array)$children as $child) 
    { 
        $tmp_dom = new DOMDocument(); 
        $tmp_dom -> appendChild($tmp_dom -> importNode($child, true)); 
        $innerHTML .= trim($tmp_dom -> saveHTML()); 
    } 

    return $innerHTML; 
}

function DOMGet($html, $class, $num = 0, $type = "class")
{
    $dom = new DOMDocument('1.0', 'utf-8');
    @$dom -> loadHTML($html);
    $xpath = new DOMXPath($dom);
    $q = '//div[@'.$type.'="'.$class.'"]';

    if(is_numeric($num))
    {
        $arr = $xpath -> query($q);
        $arr = $arr -> item($num);

        return innerHTML($arr);
    }
    else if(strtoupper($num) == "ALL")
    {
        $arr = $xpath -> query($q);
        $abs = array();

        foreach($arr as $el) $abs[] = innerHTML($el);
        return $abs;

    }

    return false;
}

但它根本不起作用，有时当我尝试调用标签时（例如class =“test”）它没有显示任何内容！有人可以修复代码吗？

Answer 1

你不能将DOMNodeList强制转换为数组，它显然会返回一个空数组。

Answer 2

这是你的m_INNER方法搞砸了你。你可以将它剥离到我的例子中，它会完美地运作。

function m_INNER($element) 
{ 
    $innerHTML = ''; 
    $children = $element->childNodes; 
    foreach ($children as $child) 
    { 
        $innerHTML .= $child->ownerDocument->saveXML( $child ); 
    } 

    return $innerHTML; 
}

function DOMGet($html, $class, $num = 0, $type = "class")
{

    $dom = new DOMDocument('1.0', 'utf-8');
    @$dom -> loadHTML($html); // You don't need the @ declaration here.
    $xpath = new DOMXPath($dom);
    $q = '//div[@'.$type.'="'.$class.'"]';

    if(is_numeric($num))
    {
        $arr = $xpath -> query($q);
        $arr = $arr -> item($num);

        return m_INNER($arr);
    }

    else if(strtoupper($num) == "ALL")
    {
        $arr = $xpath -> query($q);
        $abs = array();

        foreach($arr as $el) $abs[] = m_INNER($el);
        return $abs;

    }

    return false;
}


$html = '<html><body><div class="apa">Test</div></body></html>';

print_r(DOMGet($html, "apa"));

有效

干杯

PHP修复从url函数获取div

2 个答案: