Usage of php curl_init function_PHP tutorial

Use PHP’s cURL library to crawl web pages simply and effectively. 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 contents and parameters of a curl connection resource curl_errno — Returns a numeric number containing error information for 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 individual curl handle resources to a curl batch session curl_multi_close — Close a batch handle resource curl_multi_exec — parse a curl batch handle curl_multi_getcontent — Returns a text stream of fetched output curl_multi_info_read — Get the relevant transmission information of the currently parsed curl curl_multi_init — Initialize a curl batch handle resource 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 as an array curl_setopt — Set session parameters for a curl curl_version — Get curl-related version information ​ The function of the curl_init() function initializes 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, and 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 ​ The code is as follows: ​ ​ 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数据    代码如下:     例子三:使用代理服务器 使用代理服务器    代码如下:     例子四: 模拟登录   Curl 模拟登录 discuz 程序,适合DZ7.0,将username改成你的用户名,userpass改成你的密码就可以了. Curl 模拟登录 discuz 程序     复制代码 代码如下: /i', $contents, $matches);    if(!empty($matches)) {        $formhash = $matches[1];    } else {        die('Not found the forumhash.');    }      //POST数据，获取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);      //带着上面得到的COOKIE获取需要登录后才能查看的页面内容    $ch = curl_init($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);   

http://www.bkjia.com/PHPjc/730221.htmlwww.bkjia.comtruehttp://www.bkjia.com/PHPjc/730221.htmlTechArticle使用PHP的cURL库可以简单和有效地去抓网页。你只需要运行一个脚本，然后分析一下你所抓取的网页，然后就可以以程序的方式得到你想要的...