将更改写入Zend Dom查询对象 [英] Writing Changes Back to a Zend Dom Query Object

问题描述

我想循环使用HTML文档中的图像，并设置宽度/高度（如果它们不存在）。

I want to loop through images in an HTML document and set the width/height if they don't exist.

这里是一小段工作代码： / p>

Here's a minimal piece of working code:

$content = '<img src="example.gif" />';
$dom = new Zend_Dom_Query($content);
$imgs = $dom->query('img');
foreach ($imgs as $img) {
    $width = (int) $img->getAttribute('width');
    $height = (int) $img->getAttribute('height');
    if ((0 == $width) && (0 == $height)) {
        $img->setAttribute('width', 100));
        $img->setAttribute('height', 100);
    }
}
$content = $dom->getDocument();

setAttribute（）调用设置值，我已经通过回应这些值来验证了这一点。问题是 DOMElement 没有被写回到 Zend_Dom_Query 对象。 $ content 变量在结尾不变。

The setAttribute() calls set the values, and I've verified that by echoing the values. The problem is that the DOMElement is not getting written back to the Zend_Dom_Query object. The $content variable is unchanged at the end.

解决方案： cbuckley 获得信用，但这里是我的最终工作代码：

SOLUTION: cbuckley gets the credit, but here is my final working code:

$doc = new DOMDocument();
$doc->loadHTML($content);
foreach ($doc->getElementsByTagName('img') as $img) {
    if ((list($width, $height) = getimagesize($img->getAttribute('src')))
            && (0 === (int) $img->getAttribute('width'))
            && (0 === (int) $img->getAttribute('height'))) {
        $img->setAttribute('width', $width);
        $img->setAttribute('height', $height);
    }
}
$content = $doc->saveHTML();

使用 Zend_Dom_Query ：

$dom = new Zend_Dom_Query($content);
$imgs = $dom->query('img');
foreach ($imgs as $img) {
    if ((list($width, $height) = getimagesize($img->getAttribute('src')))
            && (0 === (int) $img->getAttribute('width'))
            && (0 === (int) $img->getAttribute('height'))) {
        $img->setAttribute('width', $width);
        $img->setAttribute('height', $height);
    }
}
$content = $imgs->getDocument()->saveHTML();

推荐答案

Zend_Dom_Query对象将您的内容字符串作为其文档。你所寻求的文件是另一个对象;它在Zend_Dom_Query_Result对象 $ imgs 中返回，因此使用 $ imgs-> getDocument（）

The Zend_Dom_Query object holds your content string as its "document". The document you seek is in another object; it's returned in the Zend_Dom_Query_Result object $imgs, so use $imgs->getDocument() instead.

您还可以使用直接DOM操作：

You could also do it with direct DOM manipulation:

$doc = new DOMDocument();
$doc->loadXml($content);

foreach ($doc->getElementsByTagName('img') as $img) {
    $width  = (int) $img->getAttribute('width');
    $height = (int) $img->getAttribute('height');

    if (0 === $width && 0 === $height) {
        $img->setAttribute('width',  '100');
        $img->setAttribute('height', '100');
    }
}

$content = $doc->saveXML();

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