为什么在第二次调用时，php“curl”功能无法正常工作？

Question

I am using php Curl for first time This is my code :

$ch = curl_init();
curl_setopt($ch,CURLOPT_URL,'http://huger.blog.ir/rss/');
curl_setopt($ch,CURLOPT_RETURNTRANSFER,true);
$full = curl_exec($ch);
curl_close($ch);
$full = (string)$full;
$l = strpos($full,'</link>');
$start = strpos($full,'<link>',$l);
$end = strpos($full,'</link>',$l+2);
global $link;
$link = substr($full, $start , $end-$start);
$v = curl_init();
curl_setopt($v,CURLOPT_URL,$link);
curl_setopt($v,CURLOPT_RETURNTRANSFER,true);
$page = curl_exec($v);
curl_close($v);
echo $page;

$ch curl does its job and $link made correctly. now i think my second curl ($v) doesnt work. can anyone help please ?

Answer 1

Try this code

$ch = curl_init();
curl_setopt($ch,CURLOPT_URL,'http://huger.blog.ir/rss/');
curl_setopt($ch,CURLOPT_RETURNTRANSFER,true);
$full = curl_exec($ch);
curl_close($ch);
$full = (string)$full;
$l = strpos($full,'</link>');
$start = strpos($full,'<link>',$l);
$end = strpos($full,'</link>',$l+2);
global $link;
$link = substr($full, $start , $end-$start);
var_dump($link);
$v = curl_init();
curl_setopt($v,CURLOPT_URL,$link);
curl_setopt($v,CURLOPT_RETURNTRANSFER,true);
$page = curl_exec($v);
echo curl_error($v);
curl_close($v);
var_dump($page);

You can see that there a tag in front of your url like

string '<link>http://huger.blog.ir/1394/08/24/start' (length=43)

This is causing the issue