php curl_exec returns empty - php

$ch = curl_init();
curl_setopt($ch, CURLOPT_URL, $url);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
curl_setopt($ch, CURLOPT_PROXY, $proxy); // $proxy is ip of proxy server
curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, 0);
curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, 0);
curl_setopt($ch, CURLOPT_CONNECTTIMEOUT, 10);
curl_setopt($ch, CURLOPT_TIMEOUT, 10);
$httpCode = curl_getinfo($ch , CURLINFO_HTTP_CODE); // this results 0 every time
echo '<br> curl'.$ch; //this line outputs resource id#5
$exec = stripslashes(curl_exec($ch));
echo '<br> exec'.curl_exec($ch); //this results blank
i am confused why $exec does not return anything ,i am new to curl please help, thanks in advance


curl_exec will return false when the request failed. Adjust your function to this :
$ch = curl_init();
curl_setopt($ch, CURLOPT_URL, $url);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
curl_setopt($ch, CURLOPT_PROXY, $proxy); // $proxy is ip of proxy server
curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, 0);
curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, 0);
curl_setopt($ch, CURLOPT_CONNECTTIMEOUT, 10);
curl_setopt($ch, CURLOPT_TIMEOUT, 10);
$httpCode = curl_getinfo($ch , CURLINFO_HTTP_CODE); // this results 0 every time
$response = curl_exec($ch);
if ($response === false)
$response = curl_error($ch);
echo stripslashes($response);
curl_close($ch);
This way u'll see the curl error


You're trying to access a HTTP response code before you actually make the HTTP call. Reverse the execution as follows:
$response = curl_exec($ch);
$httpCode = curl_getinfo($ch , CURLINFO_HTTP_CODE); // this results 0 every time


Try:
curl_setopt($ch, CURLOPT_TIMEOUT, 50);
Maybe the response is longer than 10.
I had the same issue, I solved like this.


The result return 0 mean that you can not connect to the server so please recheck your proxy and increase the timeout :)

Related

How can I check if RESTAPI is down using curl php

I wants to make a virtual environment to check if web-service is down.
Case: If web-service is down for 7 seconds then system should re-try once and if not work then it should send the notification to admin.
$ch = curl_init();
curl_setopt($ch, CURLOPT_FAILONERROR, true);
curl_setopt($ch, CURLOPT_URL, $url);
// Use 0 to wait indefinitely.
curl_setopt($ch, CURLOPT_CONNECTTIMEOUT, 7);
// The maximum number of seconds to allow cURL functions to execute
curl_setopt($ch, CURLOPT_TIMEOUT, 7);
curl_setopt($ch, CURLOPT_HEADER, FALSE);
//curl_setopt($ch, CURLOPT_NOBODY, TRUE); // remove body
curl_setopt($ch, CURLOPT_RETURNTRANSFER, TRUE);
$responseData = curl_exec($ch);
$curl_errno = curl_errno($ch);
$curl_error = curl_error($ch);
$httpCode = curl_getinfo($ch);
curl_close($ch);

You could try this:
$url = 'my.url';
$ch = curl_init($url);
curl_setopt($ch, CURLOPT_NOBODY, true);
curl_setopt($ch, CURLOPT_FOLLOWLOCATION, true);
curl_exec($ch);
$retcode = curl_getinfo($ch, CURLINFO_HTTP_CODE);
curl_close($ch);
if ($retcode == 200)
{
// It's working
}
else
{
// It's down
}

Finally, I found the solution.
function checkData($loop = 0){
$url = 'http://google.co.in:8080/';
$ch = curl_init();
curl_setopt($ch, CURLOPT_FAILONERROR, true);
curl_setopt($ch, CURLOPT_URL, $url);
// Use 0 to wait indefinitely.
curl_setopt($ch, CURLOPT_CONNECTTIMEOUT, 7);
// The maximum number of seconds to allow cURL functions to execute
curl_setopt($ch, CURLOPT_TIMEOUT, 7);
curl_setopt($ch, CURLOPT_HEADER, FALSE);
//curl_setopt($ch, CURLOPT_NOBODY, TRUE); // remove body
curl_setopt($ch, CURLOPT_RETURNTRANSFER, TRUE);
$responseData = curl_exec($ch);
$curl_errno = curl_errno($ch);
$curl_error = curl_error($ch);
$httpCode = curl_getinfo($ch);
curl_close($ch);
if ($curl_errno > 0){
if($loop > 1 ){
//send mail to admin
}else{
$loop++;
sleep(7);
checkData();
}
}
}
checkData();

PHP Curl - Setting the URL to an in-site URL

$ch = curl_init('localhost/beater');
curl_setopt($ch, CURLOPT_POST, true);
curl_setopt($ch, CURLOPT_POSTFIELDS, $post);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
curl_setopt($ch, CURLOPT_FOLLOWLOCATION, true);
//curl_setopt($ch, CURLOPT_CONNECTTIMEOUT, 0);
curl_setopt($ch, CURLOPT_TIMEOUT, 3); //timeout in seconds
header('Content-Type: application/json');
echo curl_exec($ch);
// Check if any error occurred
if(curl_errno($ch))
{
echo curl_errno($ch);
//header('Location: error');
}
As the title says, instead of setting the domain every time, how can I just type the PHP file? (As it's on my domain).
If I set it to $ch = curl_init('beater'); or $ch = curl_init('beater.php'); I just get "Error 3" which is a malformed URL
I hope you guys can help!

CURLOPT_CONNECTTIMEOUT is not working

i am learning about CURLOPT_CONNECTTIMEOUT, i am using a proxy in this test with 25 seconds timeout setting, but it never timed out, i dont know why. here is my simple code
$proxy="124.206.54.251:3128";
$timeout = 25;
$url = "http://google.com";
$ch = curl_init();
curl_setopt($ch, CURLOPT_URL, $url);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
curl_setopt($ch, CURLOPT_CONNECTTIMEOUT, $timeout);
curl_setopt($ch, CURLOPT_PROXY, $proxy);
curl_setopt($ch, CURLOPT_PROXYTYPE, CURLPROXY_HTTP);
curl_setopt($ch, CURLOPT_HEADER, 1);
curl_setopt($ch, CURLINFO_HEADER_OUT, true);
$headerSent = curl_getinfo($ch, CURLINFO_HEADER_OUT );
$returned_msg = curl_exec($ch);
$error = curl_error($ch);
$info= curl_getinfo($ch);
curl_close($ch);
echo "<br>".$returned_msg."<br>".$info['total_time']."<br>".$error;
can someone plz tell why it never timed out? i only want to wait 25 second and it is unable to for any reason such as proxy is dead, then it should timed out.

CURLOPT_CONNECTTIMEOUT only sets the timeout for the amount of time it takes to connect. If you want to limit the amount of time the entire request is allowed to take, use CURLOPT_TIMEOUT instead.

switch from curl to multi_curl or speed up url validator

i have a database with reciprocal urls and check it daily for availability, so i can sort available links with unavailable.
i do it in such way:
<?php
foreach($urls as $url) {
$ch = curl_init();
curl_setopt($ch, CURLOPT_USERAGENT, 'Mozilla/4.0 (compatible;)');
curl_setopt($ch, CURLOPT_URL,$url );
curl_setopt($ch, CURLOPT_HEADER, 1);
curl_setopt($ch, CURLOPT_TIMEOUT, 30);
curl_setopt($ch, CURLOPT_NOBODY, TRUE);
curl_setopt($ch, CURLOPT_FAILONERROR, TRUE);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, TRUE);
curl_setopt($ch, CURLOPT_CONNECTTIMEOUT_MS, 60000);
curl_setopt($ch, CURLOPT_PROXY, '127.0.0.1:107');
$page = curl_exec($ch);
$httpcode = curl_getinfo($ch, CURLINFO_HTTP_CODE);
curl_close($ch);
if($httpcode>=100 && $httpcode<600) echo $httpcode; else echo '0';
}
?>
It output the header code. How can i use same function in more sleep way? because in this way to execute this script take about 15 minutes for 100 links. Thank you for any ideas and suggestions. I also tried to use multi_curl, but cant understand how to manage outputs.

How to use CURL via a proxy?

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;
?>

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.

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;

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

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;
}

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