PHP：simple_html_dom解析html字符串

composer require voku/simple_html_dom

<?php
require __DIR__ . '/../vendor/autoload.php';
use voku\helper\HtmlDomParser;
function replaceImage($html){
    $dom = new HtmlDomParser($html);
    // 查找所有img标签
    $elements = $dom->find('img');
    foreach ($elements as $element){
        // 获取src属性
        $src = $element->getAttribute('src');
        // 设置src属性
        $element->setAttribute('src', 'new-image-url');
    }
    // 返回字符串
    return $dom->html();
}
$str = '<p><img src="image-url"></p>';
echo replaceImage($str);
// <p><img src="new-image-url"></p>