php - 如何从html中获取图片的src和值，并将其存储到php变量中？

Question

我知道可以使用 DOMdocument

$html = '<img id="garden" value="yellow" src="/images/flowers.png"
         alt="Image" width="100" height="100" />';

$doc = new DOMDocument();
$doc->loadHTML($html);
$xpath = new DOMXPath($doc);
$src = $xpath->evaluate("string(//img/@src)"); # "/images/image.jpg"

但是如何从 img 标签获取 src 和值而不将整个标签硬编码到 $html 变量中？

<img id="garden" value="yellow" src="/images/flowers.png"
         alt="Image" width="100" height="100" />

Answer 1

这样就可以了

<?php
$html='<img id="garden" value="yellow" src="/images/flowers.png"
         alt="Image" width="100" height="100" />';
$dom = new DOMDocument;
$dom->loadHTML($html);
foreach ($dom->getElementsByTagName('img') as $tag) {

echo $tag->getAttribute('value'); // "prints" yellow
    echo "<br>";
echo $tag->getAttribute('src'); // "prints" /images/flowers.png
}