打算做个模板爬虫，爬啊爬。
爬虫爬过来的代码不显示调用图片，css，js的绝对路径，引用到本地格式就错乱了。
为了解决这个问题，特地请教大师并优化代码，代码如下。
<?php
$rpp = ‘<sdf src="bbbs/sdd" <link rel="stylesheet" type="text/css" href="/public/ui/v2/static/css/basic.css?1594346753">‘; //源代码，有加斜杠的，有没加斜杠的
$furl = "http://www.baidu.com"; /暂定为目标url
function relative_to_absolute($content, $feed_url) {
preg_match(‘/(http|https|ftp):\/\//‘, $feed_url, $protocol);
$server_url = preg_replace("/(http|https|ftp|news):\/\//", "", $feed_url);
$server_url = preg_replace("/\/.*/", "", $server_url);
if ($server_url == ‘‘) {
return $content;
}
if (isset($protocol[0])) {
$new_content = preg_replace(‘/href="/‘, ‘href="‘.$protocol[0].$server_url.‘/‘, $content);
$new_content = preg_replace(‘/href="\//‘, ‘href="‘.$protocol[0].$server_url.‘/‘, $new_content);
$new_content = preg_replace(‘/src="/‘, ‘src="‘.$protocol[0].$server_url.‘/‘, $new_content);
$new_content = preg_replace(‘/src="\//‘, ‘src="‘.$protocol[0].$server_url.‘/‘, $new_content);
} else {
$new_content = $content;
}
return $new_content;
}
print_r(relative_to_absolute($rpp,$furl));
?>
输出结果如下
<sdf src="http://www.baidu.com/bbbs/sdd" <link rel="stylesheet" type="text/css" href="http://www.baidu.com//public/ui/v2/static/css/basic.css?1594346753">
希望能解决你的问题。
原文：https://www.cnblogs.com/bdua/p/14069047.html