Several examples of curl in PHP

Using the PHP curl library, you can easily and effectively grab Pages. You just need to run a script, then analyze the page you crawled, and then you can get the data you want in a Program. Whether you want to take part of the data from a link, or take an XML file and import it into the database, the fear is simply to get the Web content, CURL is a powerful PHP library.

Curl Libraries in PHP (Client URL library Function)

Curl_close-closing a Curl session
Curl_copy_handle-copy all the contents and parameters of a Curl connection resource
Curl_errno-returns A numeric number that contains the current session error information
Curl_error-returns A string containing the current session error message
Curl_exec-performing a Curl session
Curl_getinfo-gets the information for a Curl connection resource handle
Curl_init-initialization of a Curl session
Curl_multi_add_handle-adding A separate curl handle resource to a curl batch session
Curl_multi_close-closing a batch handle resource
Curl_multi_exec-parsing A curl Batch handle
Curl_multi_getcontent-returns the text stream of the obtained output
Curl_multi_info_read-gets the related transfer information for the currently resolved curl
Curl_multi_init-initializing A Curl Batch handle resource
Curl_multi_remove_handle-removing a handle resource from the Curl batch handle resource
Curl_multi_select-get all the sockets associated with the CURL extension, which can and be "selected"
Curl_setopt_array-set session parameters as an array for a curl
curl_setopt-setting session parameters for a curl
Curl_version-getting The version information about Curl

The Curl_init () function initializes a curl session, and the only parameter to the Curl_init () function is optional, representing a URL address.
The function of the curl_exec () function is to perform a curl session, and the only argument is the handle returned by the Curl_init () Function.
The function of the Curl_close () function is to close a curl session, and the only argument is the handle returned by the Curl_init () Function.


Example One: Basic Example

Basic examples
﹤?php
Initialize a CURL object
$curl = Curl_init ();
Set the URL you need to crawl
curl_setopt ($curl, curlopt_url, ' http://www1.qixoo.com ');
Set Header
curl_setopt ($curl, curlopt_header, 1);
Sets the curl parameter, which requires the result to be saved to a string or output to the Screen.
curl_setopt ($curl, curlopt_returntransfer, 1);
Run curl, request a Web page
$data = curl_exec ($curl);
Close URL Request
Curl_close ($curl);
Show the data obtained
Var_dump ($data);

?>


Example Two: Post data

sendsms.php, which can accept two form fields, one is the phone number, and the other is the text message Content.


﹤?php
$phoneNumber = ' 13812345678 ';
$message = ' This message is generated by Curl and PHP ';
$curlPost = ' pnumber= '.　UrlEncode ($phoneNumber).　' &message= '.　UrlEncode ($message). ' &submit=send ';
$ch = Curl_init ();
curl_setopt ($ch, curlopt_url, ' http://www.lxvoip.com/sendSMS.php ');
curl_setopt ($ch, curlopt_header, 1);
curl_setopt ($ch, curlopt_returntransfer, 1);
curl_setopt ($ch, curlopt_post, 1);
curl_setopt ($ch, curlopt_postfields, $curlPost);
$data = curl_exec ();
Curl_close ($ch);
? ﹥

Example three: using a proxy server

﹤?php
$ch = Curl_init ();
curl_setopt ($ch, curlopt_url, ' http://www.cmx8.cn ');
curl_setopt ($ch, curlopt_header, 1);
curl_setopt ($ch, curlopt_returntransfer, 1);
curl_setopt ($ch, curlopt_httpproxytunnel, 1);
curl_setopt ($ch, curlopt_proxy, ' proxy.lxvoip.com:1080 ');
curl_setopt ($ch, curlopt_proxyuserpwd, ' User:password ');
$data = curl_exec ();
Curl_close ($ch);
? ﹥



Example Four: Analog Login

Curl Simulation Login Discuz program, suitable for DZ7.0, will username changed to your user name, Userpass changed to your password on it.


<?php
/**
* Curl Emulation Login Discuz Program
* The forum login function that has not been implemented to enable verification code
*/
!extension_loaded (' Curl ') && die (' The curl extension are not loaded. ');
$discuz _url = ' http://www.lxvoip.com ';//forum address
$login _url = $discuz _url. ' /logging.php?action=login ';//login page Address
$get _url = $discuz _url. ' /my.php?item=threads '; My posts

$post _fields = Array ();
The following two items do not need to be modified
$post _fields[' Loginfield '] = ' username ';
$post _fields[' Loginsubmit ') = ' true ';
User name and password must be filled in
$post _fields[' Username '] = ' Lxvoip ';
$post _fields[' Password '] = ' 88888888 ';
Safety questions
$post _fields[' QuestionID '] = 0;
$post _fields[' Answer '] = ';
@todo Verification Code
$post _fields[' seccodeverify '] = ';

Get Form Formhash
$ch = Curl_init ($login _url);
curl_setopt ($ch, curlopt_header, 0);
curl_setopt ($ch, curlopt_returntransfer, 1);
$contents = curl_exec ($ch);
Curl_close ($ch);
Preg_match ('/<input\s*type= ' hidden "\s*name=" formhash "\s*value=" (. *?) " \s*\/>/i ', $contents, $matches);
If (!empty ($MATCHES)) {
$formhash = $matches [1];
} else {
Die (' not found the Forumhash. ');
}

Post data, Obtaining cookies
$cookie _file = dirname (__file__). '/cookie.txt ';
$cookie _file = Tempnam ('/tmp ');
$ch = Curl_init ($login _url);
curl_setopt ($ch, curlopt_header, 0);
curl_setopt ($ch, curlopt_returntransfer, 1);
curl_setopt ($ch, curlopt_post, 1);
curl_setopt ($ch, curlopt_postfields, $post _fields);
curl_setopt ($ch, curlopt_cookiejar, $cookie _file);
Curl_exec ($ch);
Curl_close ($ch);

Take the cookie above to get the page content you need to log in to see
$ch = Curl_init ($get _url);
curl_setopt ($ch, curlopt_header, 0);
curl_setopt ($ch, curlopt_returntransfer, 0);
curl_setopt ($ch, curlopt_cookiefile, $cookie _file);
$contents = curl_exec ($ch);
Curl_close ($ch);
Var_dump ($contents);
?>

Several examples of curl in PHP
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Several examples of curl in PHP