对于任何html td中的任何图像,为了得到以下结果,正则表达式是什么?
从:
<td width="7" height="50" nowrap>
<img src="/images/img_1.png" width="7" height="50" alt="" />
</td>
到:
<td width="7" height="50" nowrap background="/images/img_1.png"></td>
使用正则表达式解析 HTML 是不好的做法。相反,请使用 PHP 中提供的专门用于解析 HTML 的工具,即DomDocument
[ doc ]。
// create a new DomDocument object
$doc = new DOMDocument();
// load the HTML into the DomDocument object (this would be your source HTML)
$doc->loadHTML('
<table>
<tr>
<td width="7" height="50" nowrap>
<img src="/images/img_1.png" width="7" height="50" alt="" />
</td>
</tr>
</table>
');
//Loop through each <td> tag in the dom
foreach($doc->getElementsByTagName('td') as $cell) {
// grab any images in this cell
$images = $cell->getElementsByTagName('img');
if ($images->length >= 1) { // if an image is found
$image = $images->item(0);
// add the 'background' property to the cell, use the 'src' property
$cell->setAttribute('background', $image->getAttribute('src'));
// remove the image
$cell->removeChild($image);
}
}
echo $doc->saveHTML();
在行动中看到它:http: //codepad.viper-7.com/x9ooyp
文档
DomDocument
- http://php.net/manual/en/class.domdocument.phpDomElement
- http://www.php.net/manual/en/class.domelement.phpDomElement::getAttribute
- http://www.php.net/manual/en/domelement.getattribute.phpDOMElement::setAttribute
- http://www.php.net/manual/en/domelement.setattribute.phpDomDocument::loadHTMLFile
- http://www.php.net/manual/en/domdocument.loadhtmlfile.php