Summary of Six Methods of Calling Remote URLs in PHP_PHP Tutorial

Sample code 1: Use file_get_contents to get the content in get mode

Copy the code The code is as follows:

$url='http://www.baidu.com/';
$html=file_get_contents($url);
//print_r($http_response_header);
ec($html);
printhr();
printarr($http_response_header);
printhr();
?>

Example code 2: Open the url with fopen and get Method to obtain content

Copy code The code is as follows:

$fp=fopen($url,' r');
printarr(stream_get_meta_data($fp));
printhr();
while(!feof($fp)){
$result.=fgets($fp,1024) ;
}
echo "url body: $result";
printhr();
fclose($fp);
?>

Sample code 3: Use the file_get_contents function to get the url in post mode

Copy the code The code is as follows:

$data=array('foo'=>'bar');
$data=http_build_query($data);

$opts=array(
'http'=>array(
'method'=>'POST',
'header'=>"Content-type: application/x-www-form-urlencodedrn".
"Content-Length: ".strlen( $data)."rn",
'content'=>$data
),
);
$context=stream_context_create($opts);
$html=file_get_contents(' http://localhost/e/admin/test.html',false,$context);
echo$html;
?>

Sample code 4: Use fsockopen function Open the url and get the complete data in get mode, including header and body

Copy the code The code is as follows:

functionget_url($url,$cookie=false){
$url=parse_url($url);
$query=$url[path]."?".$url[query];
ec("Query:".$query);
$fp=fsockopen($url[host],$url[port]?$url[port]:80,$errno,$errstr,30);
if(!$fp){
returnfalse;
}else{
$request="GET$queryHTTP/1.1rn";
$request.="Host:$url[host] rn";
$request.="Connection: Closern";
if($cookie)$request.="Cookie: $cookien";
$request.="rn";
fwrite ($fp,$request);
while(!@feof($fp)){
$result.=@fgets($fp,1024);
}
fclose($fp) ;
return$result;
}
}
//Get the html part of the url, remove the header
functionGetUrlHTML($url,$cookie=false){
$rowdata=get_url ($url,$cookie);
if($rowdata)
{
$body=stristr($rowdata,"rnrn");
$body=substr($body,4,strlen ($body));
return$body;
}
returnfalse;
}
?>

Sample code 5: Open url with fsockopen function , obtain complete data in POST mode, including header and body

Copy code The code is as follows:

>functionHTTP_Post($URL,$data,$cookie,$referrer=""){
// parsing the given URL
$URL_Info=parse_url($URL);

// Building referrer
if($referrer=="")// if not given use this script. as referrer
$referrer="111";

// making string from $data
foreach ($dataas$key=>$value)
$values[]="$key=".urlencode($value);
$data_string=implode("&",$values);

// Find out which port is needed - if not given use standard (=80)
if(!isset($URL_Info["port"]))
$URL_Info["port"]=80 ;

// building POST-request:
$request.="POST ".$URL_Info["path"]." HTTP/1.1n";
$request.="Host: ".$URL_Info["host"]."n";
$request.="Referer:$referern";
$request.="Content-type: application/x-www-form-urlencodedn" ;
$request.="Content-length: ".strlen($data_string)."n";
$request.="Connection: closen";
$request.="Cookie: $cookien ";
$request.="n";
$request.=$data_string."n";

$fp=fsockopen($URL_Info["host"],$URL_Info[" port"]);
fputs($fp,$request);
while(!feof($fp)){
$result.=fgets($fp,1024);
}
fclose($fp);
return$result;
}
printhr();
?>

Sample code 6: Using the curl library, use Before curling the library, you may need to check php.ini to see if the curl extension has been turned on

Copy the code The code is as follows:

$ch = curl_init();
$timeout = 5;
curl_setopt ($ch, CURLOPT_URL, 'http://www.baidu.com/');
curl_setopt ($ch, CURLOPT_RETURNTRANSFER, 1);
curl_setopt ($ch, CURLOPT_CONNECTTIMEOUT, $timeout);
$file_contents = curl_exec($ch);
curl_close($ch);
echo $ file_contents;
?>

About curl library:
curl official website http://curl.haxx.se/
curl is a file transfer tool using URL syntax, supporting FTP, FTPS, HTTP HTTPS SCP SFTP TFTP TELNET DICT FILE and LDAP. curl supports SSL certificates, HTTP POST, HTTP PUT, FTP uploads, Kerberos, HTTP-based uploads, proxies, cookies, user + password proof, file transfer recovery, http proxy channels and a lot of other useful tricks

Copy code The code is as follows:

functionprintarr(array$arr)
{
echo"";
foreach($arras$key=>$value)
{
echo"$key=$value < ;br>";
}
}
?>

====================== ================================
The code for PHP to capture remote website data
There may still be Many programming enthusiasts will encounter the same question, that is, how to crawl the HTML code of other people's websites like a search engine, and then collect and organize the code into useful data for themselves! Let me introduce some simple examples today.

Ⅰ. Example of grabbing the title of a remote web page:
The following is the code snippet:

Copy the code The code is as follows:

/*
+--------------------------------- ----------------------------
+ Grab the code for the web page title, directly copy this code snippet and save it as a .php file Just execute.
+--------------------------------------------- ------------------
*/

error_reporting(7);
$file = fopen ("http://www. jb51.net/", "r");
if (!$file) {
echo "Unable to open remote file.n";
exit;
}
while (!feof ($file)) {
$line = fgets ($file, 1024);
if (eregi ("