A wave of the common usage code examples of the Curl Library in PHP, a wave of curl_php tutorials

A common usage code example of a Curl library in PHP, a wave of curl

PHP Curl is a good feature, a few good pieces of the following collection

0. Basic examples
General Flow:

$to _url=$_get[' url '];p rint_r ($_get), if (substr ($to _url,0,1) = = '/') {$to _url= "http://www.amazon.com". $to _url;} echo $to _url;//Initialize $ch = Curl_init ();//SET options, including Urlcurl_setopt ($ch, Curlopt_url, $to _url); curl_setopt ($ch, Curlopt_ Returntransfer, 1); curl_setopt ($ch, Curlopt_header, 0);//execute and get HTML document contents $output = curl_exec ($ch); $output =preg_replace ("#href =\" # "," href=\ "http://in2.qq-ex.com/amazon.php?url=", $output);//Release curl handle Curl_close ($ch); echo $output;// Specify the proxy address curl_setopt ($ch, Curlopt_proxy, ' 11.11.11.11:8080 ');//if required, provide a username and password curl_setopt ($ch, Curlopt_proxyuserpwd, ' User:pass ');

1. Test whether the website is running properly

if (isdomainavailible (' http://gz.itownet.cn '))   {     echo "up and running!";   }   else   {     echo "woops, nothing found there.";   }    Returns true, if domain is availible, false if not   function isdomainavailible ($domain)   {     //check, if a Vali D URL is provided     if (!filter_var ($domain, Filter_validate_url))     {       return false;     }      Initialize Curl     $curlInit = Curl_init ($domain);     curl_setopt ($curlInit, curlopt_connecttimeout,10);     curl_setopt ($curlInit, curlopt_header,true);     curl_setopt ($curlInit, curlopt_nobody,true);     curl_setopt ($curlInit, curlopt_returntransfer,true);      Get answer     $response = curl_exec ($curlInit);      Curl_close ($curlInit);      if ($response) return true;      return false;   

2, can replace the operation of File_gecontents

function File_get_contents_curl ($url) {  $ch = Curl_init ();   curl_setopt ($ch, Curlopt_header, 0);  curl_setopt ($ch, Curlopt_returntransfer, 1); Set Curl to return the data instead of printing it to the browser.  curl_setopt ($ch, Curlopt_url, $url);   $data = curl_exec ($ch);  Curl_close ($ch);   

3, save all the pictures under a website

function GetImages ($html) {  $matches = array ();  $regex = ' ~http://somedomain.com/images/(. *?) \.jpg~i ';  Preg_match_all ($regex, $html, $matches);  foreach ($matches [1] as $img) {   saveimg ($img);  }}  function Saveimg ($name) {  $url = ' http://somedomain.com/images/'. $name. JPG ';  $data = Get_data ($url);  File_put_contents (' photos/'. $name. JPG ', $data); }  $i = 1; $l = 101;  while ($i < $l) {  $html = get_data (' Http://somedomain.com/id/'. $i. '/');  GetImages ($html);  

4. FTP Application

Open a file pointer $file = fopen ("/path/to/file", "R");  The URL contains most of the info needed $url = "ftp://username:password@mydomain.com:21/path/to/new/file";  $ch = Curl_init ();  curl_setopt ($ch, Curlopt_url, $url); curl_setopt ($ch, Curlopt_returntransfer, 1);  Upload related options curl_setopt ($ch, curlopt_upload, 1); curl_setopt ($ch, Curlopt_infile, $fp); curl_setopt ($ch, Curlopt_infilesize, FileSize ("/path/to/file"));  Set for ASCII mode (e.g. text files) curl_setopt ($ch, CURLOPT_FTPASCII, 1);  

5. Use Curl to send JSON data

$data = Array ("name" = "Hagrid", "age" = "+");                                   $data _string = Json_encode ($data);                                             $ch = Curl_init (' http://api.local/rest/users ');                                    curl_setopt ($ch, Curlopt_customrequest, "POST");                                    curl_setopt ($ch, Curlopt_postfields, $data _string);                                  curl_setopt ($ch, Curlopt_returntransfer, true);                                    curl_setopt ($ch, Curlopt_httpheader, Array (                                        ' Content-type:application/json ',                                           ' content-length: '. strlen ($ (data_string)))                                     ;                                                             

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