PHP curl() get all header at one time - php

Question

<?php
$url = 'http://fb.com';
$curl = curl_init();
curl_setopt_array($curl, array(
CURLOPT_URL => $url,
CURLOPT_HEADER => true,
));
$header = explode("\n", curl_exec($curl));
curl_close($curl);
print_r($header);
Result
HTTP/1.1 301 Moved Permanently
Location: http://www.facebook.com/?_rdr
Vary: Accept-Encoding
Content-Type: text/html
X-FB-Debug: rVg0o+qDt9z/zJu7jTW1gi1WSRC8YIMu3e6XnPagx39zZ4pbV0k2yrNfZmkdTLZyfzg713X+M0Lr2jS2P018xA==
Date: Thu, 25 Feb 2016 08:48:08 GMT
Connection: keep-alive
Content-Length: 0
But I want to get all Location at one time
I enter > http://fb.com
then 301 redirect: http://www.facebook.com/?_rdr
then 302 redirect: https://www.facebook.com/
I want to get All this link at one time with status 301 302
or any better idea to get redirect location url . THANKS

Answer 1

You can get all headers from every request made until no Location header is sent using this:
$ch = curl_init();
curl_setopt($ch, CURLOPT_URL, $url);
curl_setopt($ch, CURLOPT_HEADER, true);
curl_setopt($ch, CURLOPT_FOLLOWLOCATION, true);
curl_setopt($ch, CURLOPT_NOBODY, true);
$headers = curl_exec($ch);
curl_close($ch);
But then, you'll have to extract the information yourself because $headers is only a string, not an array.
If you only need the last location, simply do curl_getinfo($ch,CURLINFO_EFFECTIVE_URL).

Answer 2

Use curl_getinfo() to check if you got a 301 or 302 response and then repeat the same code again as long as that's the case. So, put your code in a function like:
$headers = array();
function getHeaders($url) {
$curl = curl_init();
curl_setopt_array($curl, array(
CURLOPT_URL => $url,
CURLOPT_HEADER => true,
));
$header = explode("\n", curl_exec($curl));
if (in_array(curl_getinfo($curl, CURLINFO_HTTP_CODE), array(301, 302))) {
// Got a 301 or 302, store this stuff and do it again
$headers[] = $header;
curl_close($curl);
return getHeaders($url);
}
$headers[] = $header;
curl_close($curl);
}
Then $headers will hold all the headers encountered up until the first non-301/302 response.