Several examples of php curl

[Network Programming] Several examples of php curl

Using PHP's cURL library can easily and effectively capture web pages. You only need to run a script and analyze the web pages you crawled, and then you can get the data you want programmatically. Whether you want to retrieve partial data from a link, take an XML file and import it into a database, or even simply retrieve the content of a web page, cURL is a powerful PHP library.

CURL Function Library (Client URL Library Function) in PHP

curl_close — close a curl session
curl_copy_handle — copy all content and parameters of a curl connection resource
curl_errno — return a numeric number containing error information of the current session
curl_error — Returns a string containing error information for the current session
curl_exec — Execute a curl session
curl_getinfo — Get information about a curl connection resource handle
curl_init — Initialize a curl session
curl_multi_add_handle — Add a separate curl handle to a curl batch session Resources
curl_multi_close — Close a batch handle resource
curl_multi_exec — Parse a curl batch handle
curl_multi_getcontent — Return the text stream of the obtained output
curl_multi_info_read — Get the relevant transmission information of the currently parsed curl
curl_multi_init — Initialize a curl batch handle Resources
curl_multi_remove_handle — Remove a handle resource in the curl batch handle resource
curl_multi_select — Get all the sockets associated with the cURL extension, which can then be "selected"
curl_setopt_array — Set session parameters for a curl in the form of an array
curl_setopt — Set session parameters for a curl
curl_version — Get curl-related version information

The role of the curl_init() function is to initialize a curl session. The only parameter of the curl_init() function is optional and represents a URL address.
The curl_exec() function is used to execute a curl session. The only parameter is the handle returned by the curl_init() function.
The curl_close() function is used to close a curl session. The only parameter is the handle returned by the curl_init() function.

Example 1: Basic example

Basic example

﹤?php
// Initialize a cURL object
$curl = curl_init();
// Set the URL you need to crawl
curl_setopt($curl, CURLOPT_URL , 'http://www.cmx8.cn');
//Set header
curl_setopt($curl, CURLOPT_HEADER, 1);
//Set cURL parameters to require the results to be saved in a string or output to the screen.
curl_setopt($curl, CURLOPT_RETURNTRANSFER, 1);
//Run cURL and request the web page
$data = curl_exec($curl);
//Close the URL request
curl_close($curl);
//Display the obtained data
var_dump($data);

?>

Example 2: POST data

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

POST data

﹤?php
$phoneNumber　='13812345678';
$message　='This message was 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, $curlPost); exec() : //www.cmx8.cn');
curl_setopt($ch, CURLOPT_HEADER, 1);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
curl_setopt($ch, CURLOPT_HTTPPROXYTUNNEL, 1); PT_PROXY ,'proxy.lxvoip.com:1080');curl_setopt($ch, CURLOPT_PROXYUSERPWD, 'user:password');

$data = curl_exec();

curl_close($ch);

?﹥

Example 4 : Simulated login
Curl simulated login discuz program, suitable for DZ7.0, just change username to your username and userpass to your password.

Curl simulates login discuz program

/**
* Curl simulated login discuz program
* Forum login function with verification code enabled has not yet been implemented
*/

!extension_loaded('curl') && die('The curl extension is 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 post

$post_fields = array();
//The following two items do not need to be modified
$post_fields['loginfield'] = 'username';
$post_fields['loginsubmit'] = 'true';
//Username and password must be filled in
$post_fields['username'] = 'lxvoip';
$post_fields['password'] = '88888888';
//Security question
$post_fields[' questionid'] = 0;
$post_fields['answer'] = '';
//@todo verification code
$post_fields['seccoverify'] = '';
$post_fields['answer'] = '';
$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( '/< inputs*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, get COOKIE
$cookie_file = dirname(__FILE__) . '/ cookie.txt';
//$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);

//Use the COOKIE obtained above to get the page content that needs to be logged in to view
$ch = curl_init($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);
?>

The above introduces several examples of php curl, including aspects of content. I hope it will be helpful to friends who are interested in PHP tutorials.