정규식을 기반으로 Img의 src 내용을 일괄 교체하여 PHP를 사용하여 썸네일을 얻는 기능 코드에 대한 자세한 설명

/**
* 图片地址替换成压缩URL
* @param string $content 内容
* @param string $suffix 后缀
*/
function get_img_thumb_url($content="",$suffix="!c550x260.jpg")
{
$pregRule = "/<[img|IMG].*?src=[\&#39;|\"](.*?(?:[\.jpg|\.jpeg|\.png|\.gif|\.bmp]))[\&#39;|\"].*?[\/]?>/";
$content = preg_replace($pregRule, &#39;<img src="${1}&#39;.$suffix.&#39;" style="max-width:100%">&#39;, $content);
return $content;
}

$content = &#39;<a href="#" rel="external nofollow" rel="external nofollow" ><img class="center" src="https://xxx.com/styles/images/default.jpg"></a>&#39;
.&#39;<p><img class="center" src="https://img.xxx.com/images/219_Ig5eZI.jpg" style="max-width: 100%;"></p>&#39;;
$newct = get_img_thumb_url($content);
print_r($newct);

<a href="#" rel="external nofollow" rel="external nofollow" ><img src="https://xxx.com/styles/images/default.jpg!c550x260.jpg" style="max-width:100%"></a><p><img src="https://img.xxx.com/images/219_Ig5eZI.jpg!c550x260.jpg" style="max-width:100%"></p>