PHP 从字符串中获取图像的所有 URL

<?php
$string = "这是一个包含图像 URL 的字符串，如下所示：
<img src='https://example.com/image1.jpg' />
<img src='https://example.com/image2.jpg' />
<img src='https://example.com/image3.jpg' />";

$pattern = '/<img[^>]*src="([^"]+)"/i';
preg_match_all($pattern, $string, $matches);

$imageUrls = $matches[1];

foreach ($imageUrls as $imageUrl) {
    echo $imageUrl . "\n";
}
?>