Detailed explanation of basic operations of php curl_PHP tutorial

cURL is a tool for connecting and communicating with various servers using various types of protocols. It is a powerful library that supports http, https, ftp, telnet, file and other protocols. It also supports HTTPS authentication, HTTP POST, HTTP PUT, FTP upload, HTTP form-based upload, proxy, cookies and username + password authentication. .

Maybe you have also used the file_get_contents() function, but this method is insufficient for handling cookies, verification, form submission, file upload, etc.

The basic method of using cURL is as follows:
First modify the settings of the php.ini file, find php_curl.dll, and uncomment extension=php_curl.dll, because php defaults to cURL is not enabled.

Then there are the basic steps:
1. Initialization
2. Set variables (curl_setopt)
3. Execute and get the results (curl_exec )
4. The output
php example is as follows:

Copy code The code is as follows:

// Initialization
$ch = curl_init();
// Set options, including URL
curl_setopt($ch, CURLOPT_URL,"http://www.baidu .com");
//Whether to return parameters to the page (0 means yes, 1 means no)
curl_setopt($ch, CURLOPT_RETURNTRANSFER,1);
curl_setopt($ch, CURLOPT_HEADER,0) ;
//Execute and get the HTML document content
$output = curl_exec($ch);
//Close url
curl_close($ch);
?>

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