Client URL Library
- Introduction
- Installing/Configuring
- Predefined Constants
- Examples
- cURL Functions
- curl_close — Close a cURL session
- curl_copy_handle — Copy a cURL handle along with all of its preferences
- curl_errno — Return the last error number
- curl_error — Return a string containing the last error for the current session
- curl_escape — URL encodes the given string
- curl_exec — Perform a cURL session
- curl_file_create — Create a CURLFile object
- curl_getinfo — Get information regarding a specific transfer
- curl_init — Initialize a cURL session
- curl_multi_add_handle — Add a normal cURL handle to a cURL multi handle
- curl_multi_close — Close a set of cURL handles
- curl_multi_exec — Run the sub-connections of the current cURL handle
- curl_multi_getcontent — Return the content of a cURL handle if CURLOPT_RETURNTRANSFER is set
- curl_multi_info_read — Get information about the current transfers
- curl_multi_init — Returns a new cURL multi handle
- curl_multi_remove_handle — Remove a multi handle from a set of cURL handles
- curl_multi_select — Wait for activity on any curl_multi connection
- curl_multi_setopt — Set an option for the cURL multi handle
- curl_multi_strerror — Return string describing error code
- curl_pause — Pause and unpause a connection
- curl_reset — Reset all options of a libcurl session handle
- curl_setopt_array — Set multiple options for a cURL transfer
- curl_setopt — Set an option for a cURL transfer
- curl_share_close — Close a cURL share handle
- curl_share_init — Initialize a cURL share handle
- curl_share_setopt — Set an option for a cURL share handle.
- curl_strerror — Return string describing the given error code
- curl_unescape — Decodes the given URL encoded string
- curl_version — Gets cURL version information
- CURLFile — The CURLFile class
- CURLFile::__construct — Create a CURLFile object
- CURLFile::getFilename — Get file name
- CURLFile::getMimeType — Get MIME type
- CURLFile::getPostFilename — Get file name for POST
- CURLFile::setMimeType — Set MIME type
- CURLFile::setPostFilename — Set file name for POST
- CURLFile::__wakeup — Unserialization handler
- Constant hash database
- Клиентская библиотека работы с URL
- Event
- File Alteration Monitor
- FTP
- Gearman
- Net Gopher
- Gupnp
- Hyperwave API
- Облегчённый протокол доступа к каталогам (LDAP)
- Memcache
- Memcached
- mqseries
- Network
- RRDtool
- Simple Asynchronous Messaging
- SNMP
- Сокеты
- Secure Shell2
- Stomp Client
- Support Vector Machine
- Subversion
- TCP Wrappers
- Varnish
- YAZ
- YP/NIS
- ZMQ
Коментарии
In order to use curl with secure sites you will need a ca-bundle.crt file; here's a PHP script I've written which creates a fresh ca-bundle:
http://www.gknw.net/php/phpscripts/mk-ca-bundle.php
I've also written scripts in other languages, f.e. the Perl one which ships now with curl distributions:
http://curl.haxx.se/lxr/source/lib/mk-ca-bundle.pl
and also a Win32 WSH script if you prefer that:
http://www.gknw.net/vb/scripts/mk-ca-bundle.vbs
HTH, Guenter.
Hey I modified script for php 5. Also I add support server auth. and fixed some little bugs on the script.
[EDIT BY danbrown AT php DOT net: Original was written by (unlcuky13 AT gmail DOT com) on 19-APR-09. The following note was included:
Below is the my way of using through PHP 5 objecte oriented encapsulation to make thing easier.]
<?php
class mycurl {
protected $_useragent = 'Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1';
protected $_url;
protected $_followlocation;
protected $_timeout;
protected $_maxRedirects;
protected $_cookieFileLocation = './cookie.txt';
protected $_post;
protected $_postFields;
protected $_referer ="http://www.google.com";
protected $_session;
protected $_webpage;
protected $_includeHeader;
protected $_noBody;
protected $_status;
protected $_binaryTransfer;
public $authentication = 0;
public $auth_name = '';
public $auth_pass = '';
public function useAuth($use){
$this->authentication = 0;
if($use == true) $this->authentication = 1;
}
public function setName($name){
$this->auth_name = $name;
}
public function setPass($pass){
$this->auth_pass = $pass;
}
public function __construct($url,$followlocation = true,$timeOut = 30,$maxRedirecs = 4,$binaryTransfer = false,$includeHeader = false,$noBody = false)
{
$this->_url = $url;
$this->_followlocation = $followlocation;
$this->_timeout = $timeOut;
$this->_maxRedirects = $maxRedirecs;
$this->_noBody = $noBody;
$this->_includeHeader = $includeHeader;
$this->_binaryTransfer = $binaryTransfer;
$this->_cookieFileLocation = dirname(__FILE__).'/cookie.txt';
}
public function setReferer($referer){
$this->_referer = $referer;
}
public function setCookiFileLocation($path)
{
$this->_cookieFileLocation = $path;
}
public function setPost ($postFields)
{
$this->_post = true;
$this->_postFields = $postFields;
}
public function setUserAgent($userAgent)
{
$this->_useragent = $userAgent;
}
public function createCurl($url = 'nul')
{
if($url != 'nul'){
$this->_url = $url;
}
$s = curl_init();
curl_setopt($s,CURLOPT_URL,$this->_url);
curl_setopt($s,CURLOPT_HTTPHEADER,array('Expect:'));
curl_setopt($s,CURLOPT_TIMEOUT,$this->_timeout);
curl_setopt($s,CURLOPT_MAXREDIRS,$this->_maxRedirects);
curl_setopt($s,CURLOPT_RETURNTRANSFER,true);
curl_setopt($s,CURLOPT_FOLLOWLOCATION,$this->_followlocation);
curl_setopt($s,CURLOPT_COOKIEJAR,$this->_cookieFileLocation);
curl_setopt($s,CURLOPT_COOKIEFILE,$this->_cookieFileLocation);
if($this->authentication == 1){
curl_setopt($s, CURLOPT_USERPWD, $this->auth_name.':'.$this->auth_pass);
}
if($this->_post)
{
curl_setopt($s,CURLOPT_POST,true);
curl_setopt($s,CURLOPT_POSTFIELDS,$this->_postFields);
}
if($this->_includeHeader)
{
curl_setopt($s,CURLOPT_HEADER,true);
}
if($this->_noBody)
{
curl_setopt($s,CURLOPT_NOBODY,true);
}
/*
if($this->_binary)
{
curl_setopt($s,CURLOPT_BINARYTRANSFER,true);
}
*/
curl_setopt($s,CURLOPT_USERAGENT,$this->_useragent);
curl_setopt($s,CURLOPT_REFERER,$this->_referer);
$this->_webpage = curl_exec($s);
$this->_status = curl_getinfo($s,CURLINFO_HTTP_CODE);
curl_close($s);
}
public function getHttpStatus()
{
return $this->_status;
}
public function __tostring(){
return $this->_webpage;
}
}
?>
[EDIT BY danbrown AT php DOT net: Contains a bugfix supplied by "roetsch.beni at googlemail (dot) com" on 02-AUG-09, with the following note: "Fixes the bugfix: 417 bug at lighthttp server."]
I needed to use cURL in a php script to download data using not only SSL for the server authentication but also for client authentication.
On a default install of Fedora, setting up the proper cURL parameters, I would get an error:
$ php curl.php
Peer certificate cannot be authenticated with known CA certificates
The data on http://curl.haxx.se/docs/sslcerts.html was most useful. Indeed, toward to bottom it tells you to add a missing link inside /etc/pki/nssdb to use the ca-bundle.crt file. You do it so:
# cd /etc/pki/nssdb
# ln -s /usr/lib64/libnssckbi.so libnssckbi.so
Now you can do client authentication, provided you have your certificate handy with:
<?php
$data = "<soap:Envelope>[...]</soap:Envelope>";
$tuCurl = curl_init();
curl_setopt($tuCurl, CURLOPT_URL, "https://example.com/path/for/soap/url/");
curl_setopt($tuCurl, CURLOPT_PORT , 443);
curl_setopt($tuCurl, CURLOPT_VERBOSE, 0);
curl_setopt($tuCurl, CURLOPT_HEADER, 0);
curl_setopt($tuCurl, CURLOPT_SSLVERSION, 3);
curl_setopt($tuCurl, CURLOPT_SSLCERT, getcwd() . "/client.pem");
curl_setopt($tuCurl, CURLOPT_SSLKEY, getcwd() . "/keyout.pem");
curl_setopt($tuCurl, CURLOPT_CAINFO, getcwd() . "/ca.pem");
curl_setopt($tuCurl, CURLOPT_POST, 1);
curl_setopt($tuCurl, CURLOPT_SSL_VERIFYPEER, 1);
curl_setopt($tuCurl, CURLOPT_RETURNTRANSFER, 1);
curl_setopt($tuCurl, CURLOPT_POSTFIELDS, $data);
curl_setopt($tuCurl, CURLOPT_HTTPHEADER, array("Content-Type: text/xml","SOAPAction: \"/soap/action/query\"", "Content-length: ".strlen($data)));
$tuData = curl_exec($tuCurl);
if(!curl_errno($tuCurl)){
$info = curl_getinfo($tuCurl);
echo 'Took ' . $info['total_time'] . ' seconds to send a request to ' . $info['url'];
} else {
echo 'Curl error: ' . curl_error($tuCurl);
}
curl_close($tuCurl);
echo $tuData;
?>
CURL failed with PHP5.3 and Apache2.2.X on my Windows 7 machine.
It turns out that it's not enough to copy the two dll's mentioned (libeay32 and sslea32) from the php folder into your system32 folder. You HAVE TO UNBLOCK THESE TWO FILES.
Right click the file, select unblock, for each one. Then restart Apache.
Another very handy security feature added into Windows.
I wrote the following to see if a submitted URL has a valid http response code and also if it responds quickly.
Use the code like this:
<?php
$is_ok = http_response($url); // returns true only if http response code < 400
?>
The second argument is optional, and it allows you to check for a specific response code
<?php
http_response($url,'400'); // returns true if http status is 400
?>
The third allows you to specify how long you are willing to wait for a response.
<?php
http_response($url,'200',3); // returns true if the response takes less than 3 seconds and the response code is 200
?>
<?php
function http_response($url, $status = null, $wait = 3)
{
$time = microtime(true);
$expire = $time + $wait;
// we fork the process so we don't have to wait for a timeout
$pid = pcntl_fork();
if ($pid == -1) {
die('could not fork');
} else if ($pid) {
// we are the parent
$ch = curl_init();
curl_setopt($ch, CURLOPT_URL, $url);
curl_setopt($ch, CURLOPT_HEADER, TRUE);
curl_setopt($ch, CURLOPT_NOBODY, TRUE); // remove body
curl_setopt($ch, CURLOPT_RETURNTRANSFER, TRUE);
$head = curl_exec($ch);
$httpCode = curl_getinfo($ch, CURLINFO_HTTP_CODE);
curl_close($ch);
if(!$head)
{
return FALSE;
}
if($status === null)
{
if($httpCode < 400)
{
return TRUE;
}
else
{
return FALSE;
}
}
elseif($status == $httpCode)
{
return TRUE;
}
return FALSE;
pcntl_wait($status); //Protect against Zombie children
} else {
// we are the child
while(microtime(true) < $expire)
{
sleep(0.5);
}
return FALSE;
}
}
?>
Hope this example helps. It is not 100% tested, so any feedback [sent directly to me by email] is appreciated.
After a lot of frustration with the fact that nobody has documented which curl commandline options go with which library functions, I discovered that the curl commandline will tell you (in the form of a C program) if you add `--libcurl foo.c`
If you've been struggling with trying to figure out how to get your fancy curl commandline to work in PHP, this makes it a breeze!
Here you have a function that I use to get the content of a URL using cURL:
function getUrlContent($url){
$ch = curl_init();
curl_setopt($ch, CURLOPT_URL, $url);
curl_setopt($ch, CURLOPT_USERAGENT, 'Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; .NET CLR 1.1.4322)');
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
curl_setopt($ch, CURLOPT_CONNECTTIMEOUT, 5);
curl_setopt($ch, CURLOPT_TIMEOUT, 5);
$data = curl_exec($ch);
$httpcode = curl_getinfo($ch, CURLINFO_HTTP_CODE);
curl_close($ch);
return ($httpcode>=200 && $httpcode<300) ? $data : false;
}
The source comes from this website:
http://softontherocks.blogspot.com/2014/11/descargar-el-contenido-de-una-url.html
WARNING WARNING
In this example: book.curl#102885 by "frank at interactinet dot com"
There's a small bug in
<?php
...
elseif($status == $httpCode)
{
return TRUE;
}
return FALSE;
pcntl_wait($status); //Protect against Zombie children
} else {
// we are the child
while(microtime(true) < $expire)
...
?>
The code will immediately leave the function at the `return`, and pcntl_wait() will NEVER be executed, under any circumstances.
I can't see any other issues with this function however.
Please note that new versions of curl is using http2 as default, so if you are having some strange errors, 0 http status codes, etc, please explicitly specify the http version in your code.Sharing is caring, handles included.
<?php
$url_one = "php.net";
$url_two = "";
$user_agent = 'Mozilla HotFox 1.0';
$ch = curl_init();
curl_setopt($ch, CURLOPT_URL, $url_one.$url_two);
curl_setopt($ch, CURLOPT_USERAGENT, $user_agent);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
curl_setopt($ch, CURLOPT_FOLLOWLOCATION, 1);
curl_setopt($ch, CURLOPT_HEADER, 0);
curl_setopt($ch, CURLOPT_NOBODY, 0);
curl_setopt($ch, CURLOPT_TIMEOUT, 30);
$res = curl_exec($ch);
curl_close($ch);
$url_two = "lazyphp.net";
$url_one = "";
$res_two = curl_exec($ch);
curl_close($ch);
?>