How to use CURL via a proxy?

Question

I am looking to set curl to use a proxy server. The url is provided by an html form, which has not been a problem. Without the proxy it works fine. I have found code on this and other sites, but they do not work. Any help in finding the correct solution would be much appreciated. I feel that the bellow are close, but that I am missing something. Thank You.

The bellow code I adapted from here http://www.webmasterworld.com/forum88/10572.htm but it returns an error message about a missing T_VARIABLE on line 12.

<?

$url = '$_POST[1]';
$ch = curl_init();
curl_setopt($ch, CURLOPT_URL,$url);
curl_setopt($ch, CURLOPT_HTTPPROXYTUNNEL, 0);
curl_setopt($ch, CURLOPT_PROXY, '66.96.200.39:80');
curl_setopt($ch, CURLOPT_FOLLOWLOCATION, 1);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 0);
curl_setopt($ch, CURLOPT_CUSTOMREQUEST,'GET');
curl_setopt ($ch, CURLOPT_HEADER, 1);
curl_exec ($ch); 
$curl_info = curl_getinfo($ch);
curl_close($ch);
echo '<br />';
print_r($curl_info);
?>

The bellow is from curl through proxy returns no content

<?

$proxy = "66.96.200.39:80";
$proxy = explode(':', $proxy);
$url = "$_POST[1]";

$ch = curl_init();
curl_setopt($ch, CURLOPT_URL, $url);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
curl_setopt($ch, CURLOPT_PROXY, $proxy[0]);
curl_setopt($ch, CURLOPT_PROXYPORT, $proxy[1]);
curl_setopt($ch, CURLOPT_HEADER, 1);

$exec = curl_exec($ch);

echo curl_error($ch);
print_r(curl_getinfo($ch));
echo $exec;
?>

is currently live on pelican-cement.com but also does not work.

UPDATE: Thank you for all your help, I made the above changes. Now it only returns a blank screen.

<?

$url = $_POST['1'];
$ch = curl_init();
curl_setopt($ch, CURLOPT_URL,$url);
curl_setopt($ch, CURLOPT_HTTPPROXYTUNNEL, 0);
curl_setopt($ch, CURLOPT_PROXY, '66.96.200.39:80');
curl_setopt($ch, CURLOPT_FOLLOWLOCATION, 1);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 0);
curl_setopt($ch, CURLOPT_CUSTOMREQUEST,'GET');
curl_setopt ($ch, CURLOPT_HEADER, 1);
curl_exec ($ch); 
$curl_scraped_page = curl_exec($ch);
curl_close($ch);

echo $curl_scraped_page;
?>

also, you need to change $url = '$_POST[1]' to $url = $_POST[1] - otherwise, $url will be a string instead of the URL you want — yoavmatchulsky
– yoavmatchulsky, Commented Mar 6, 2011 at 17:06
Also, the key in the $_POST array is a string not an integer so you'd want it to say $_POST['1'] — fiiv
– fiiv, Commented Mar 6, 2011 at 17:20
The form on pelican-cement.com has inputs named "firstname" and "lastname", but none named "1". — John Flatness
– John Flatness, Commented Mar 6, 2011 at 22:15
@user586011: Please add your solution as an answer below and accept it. Don't put the solution into the question, that does not work well. — hakre
– hakre, Commented Jul 12, 2012 at 17:35

Bud Damyanov · Accepted Answer · 2014-12-03 10:00:19Z

250

Here is a working version with your bugs removed.

$url = 'http://dynupdate.no-ip.com/ip.php';
$proxy = '127.0.0.1:8888';
//$proxyauth = 'user:password';

$ch = curl_init();
curl_setopt($ch, CURLOPT_URL,$url);
curl_setopt($ch, CURLOPT_PROXY, $proxy);
//curl_setopt($ch, CURLOPT_PROXYUSERPWD, $proxyauth);
curl_setopt($ch, CURLOPT_FOLLOWLOCATION, 1);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
curl_setopt($ch, CURLOPT_HEADER, 1);
$curl_scraped_page = curl_exec($ch);
curl_close($ch);

echo $curl_scraped_page;

I have added CURLOPT_PROXYUSERPWD in case any of your proxies require a user name and password. I set CURLOPT_RETURNTRANSFER to 1, so that the data will be returned to $curl_scraped_page variable.

I removed a second extra curl_exec($ch); which would stop the variable being returned. I consolidated your proxy IP and port into one setting.

I also removed CURLOPT_HTTPPROXYTUNNEL and CURLOPT_CUSTOMREQUEST as it was the default.

If you don't want the headers returned, comment out CURLOPT_HEADER.

To disable the proxy simply set it to null.

curl_setopt($ch, CURLOPT_PROXY, null);

Any questions feel free to ask, I work with cURL every day.

edited Dec 3, 2014 at 10:00

Bud Damyanov

32.1k7 gold badges47 silver badges53 bronze badges

answered Feb 12, 2012 at 9:16

GravyCode

2,5411 gold badge14 silver badges6 bronze badges

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9 Comments

coding_idiot Over a year ago

nice to know that you work with CURL everyday. I tried setting a socks proxy and it works on my local machine but doesn't work on my linux dedicated server. Any idea ?

sousdev Over a year ago

@coding_idiot Most web hosts block ports that aren't 80 or 443 for security reasons.

coding_idiot Over a year ago

I already solved it though. I'm sure others will benefit from this.

Pragnesh Chauhan Over a year ago

@GravyCode: if we get proxy from some services in that case do i required to pass username/password?

user1788736 Over a year ago

How i should know if proxy port is blocked by the webhost ?

|

Somnath Muluk · Accepted Answer · 2015-12-07 13:24:52Z

43

I have explained use of various CURL options required for CURL PROXY.

$url = 'http://dynupdate.no-ip.com/ip.php';
$proxy = '127.0.0.1:8888';
$proxyauth = 'user:password';

$ch = curl_init();
curl_setopt($ch, CURLOPT_URL, $url);         // URL for CURL call
curl_setopt($ch, CURLOPT_PROXY, $proxy);     // PROXY details with port
curl_setopt($ch, CURLOPT_PROXYUSERPWD, $proxyauth);   // Use if proxy have username and password
curl_setopt($ch, CURLOPT_PROXYTYPE, CURLPROXY_SOCKS5); // If expected to call with specific PROXY type
curl_setopt($ch, CURLOPT_FOLLOWLOCATION, 1);  // If url has redirects then go to the final redirected URL.
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 0);  // Do not outputting it out directly on screen.
curl_setopt($ch, CURLOPT_HEADER, 1);   // If you want Header information of response else make 0
$curl_scraped_page = curl_exec($ch);
curl_close($ch);

echo $curl_scraped_page;

answered Dec 7, 2015 at 13:24

Somnath Muluk

58.3k39 gold badges225 silver badges230 bronze badges

1 Comment

Nate Over a year ago

These comments are helpful, but others should note that the additional options are not actually required.

Namasivayam Chinnapillai · Accepted Answer · 2020-12-10 16:32:07Z

1

root@APPLICATIOSERVER:/var/www/html# php connectiontest.php
61e23468-949e-4103-8e08-9db09249e8s1 OpenSSL SSL_connect: SSL_ERROR_SYSCALL in connection to 10.172.123.1:80 root@APPLICATIOSERVER:/var/www/html#

Post declaring the proxy settings in the php script file issue has been fixed.

$proxy = '10.172.123.1:80';
curl_setopt($cSession, CURLOPT_PROXY, $proxy); // PROXY details with port

answered Dec 10, 2020 at 16:32

Namasivayam Chinnapillai

3732 silver badges8 bronze badges

Comments

Chirag Patel · Accepted Answer · 2025-02-15 07:21:22Z

-1

Missing semicolon so code is here..
<?
$url = '$_POST[1]';
$ch = curl_init();
curl_setopt($ch, CURLOPT_URL,$url);
curl_setopt($ch, CURLOPT_HTTPPROXYTUNNEL, 0);
curl_setopt($ch, CURLOPT_PROXY, '66.96.200.39:80');
curl_setopt($ch, CURLOPT_FOLLOWLOCATION, 1);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 0);
curl_setopt($ch, CURLOPT_CUSTOMREQUEST,'GET');
curl_setopt ($ch, CURLOPT_HEADER, 1); **semicolon**
curl_exec ($ch); 
$curl_info = curl_getinfo($ch);
curl_close($ch);
print_r($curl_info);
?>

answered Feb 15 at 7:21

community wiki

Chirag Patel

1 Comment

Your Common Sense Feb 15 at 7:30

Thank you for your contribution. However, we don't accept answers for such problems. They are either to be fixed right in the question or the question must be closed. Your current answer helps noone.

hammad1238 · Accepted Answer · 2013-10-21 06:49:13Z

-3

Here is a well tested function which i used for my projects with detailed self explanatory comments

There are many times when the ports other than 80 are blocked by server firewall so the code appears to be working fine on localhost but not on the server

function get_page($url){

global $proxy;
$ch = curl_init();
curl_setopt($ch, CURLOPT_URL, $url);
//curl_setopt($ch, CURLOPT_PROXY, $proxy);
curl_setopt($ch, CURLOPT_HEADER, 0); // return headers 0 no 1 yes
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true); // return page 1:yes
curl_setopt($ch, CURLOPT_TIMEOUT, 200); // http request timeout 20 seconds
curl_setopt($ch, CURLOPT_FOLLOWLOCATION, true); // Follow redirects, need this if the url changes
curl_setopt($ch, CURLOPT_MAXREDIRS, 2); //if http server gives redirection responce
curl_setopt($ch, CURLOPT_USERAGENT,
    "Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.8.1.7) Gecko/20070914 Firefox/2.0.0.7");
curl_setopt($ch, CURLOPT_COOKIEJAR, "cookies.txt"); // cookies storage / here the changes have been made
curl_setopt($ch, CURLOPT_COOKIEFILE, "cookies.txt");
curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false); // false for https
curl_setopt($ch, CURLOPT_ENCODING, "gzip"); // the page encoding

$data = curl_exec($ch); // execute the http request
curl_close($ch); // close the connection
return $data;
}

answered Oct 21, 2013 at 6:49

hammad1238

273 bronze badges

2 Comments

villamejia Over a year ago

This helped me: curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false); // false for https

Ale Over a year ago

@villamejia Beware, though, in using CURLOPT_SSL_VERIFYPEER = false. This means that cURL wont do any certificate check when connecting to the https server, thus rendering the connection vulnerable to a possible man-in-the-middle attack – therefore data security is not guaranteed anymore. Better use CURLOPT_CAPATH to give a directory containing a set of valid root certification authorities (/etc/ssl/certs on Debian/Ubuntu, for example)

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