-5

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>
4

1 回答 1

2

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

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于 2013-03-05T17:34:03.730 回答