PHP获取网页内容的几种方法

方法1: 用file_get_contents以get方式获取内容

<?php
$url='http://www.domain.com/?para=123';
$html= file_get_contents($url);
echo$html;
?>

方法2：用file_get_contents函数,以post方式获取url

<?php
$url= 'http://www.domain.com/test.php?id=123';
$data= array('foo'=> 'bar');
$data= http_build_query($data);
 
$opts= array(
'http'=> array(
   'method'=> 'POST',
   'header'=>"Content-type: application/x-www-form-urlencoded
"  .
                     "Content-Length: "  . strlen($data) . "
",
   'content'=> $data
)
);
$ctx= stream_context_create($opts);
$html= @file_get_contents($url,'',$ctx);
 ?>

如果需要再传递cookie数据,则把

'header'=>"Content-type: application/x-www-form-urlencoded "  .

                  "Content-Length: "  . strlen($data) . " ",

修改为

'header'=>"Content-type: application/x-www-form-urlencoded "  .

                 "Content-Length: "  . strlen($data) . " ".

                 "cookie:cookie1=c1;cookie2=c2 ";

即可

方法3: 用fopen打开url, 以get方式获取内容

<?php
$fp= fopen($url,'r');
$header= stream_get_meta_data($fp);//获取报头信息
while(!feof($fp)) {
$result.= fgets($fp, 1024);
}
echo"url header: {$header} <br>":
echo"url body: $result";
fclose($fp);
?>

 方法4: 用fopen打开url, 以post方式获取内容

<?php
$data= array('foo2'=> 'bar2','foo3'=>'bar3');
$data= http_build_query($data);
 
$opts= array(
'http'=> array(
'method'=> 'POST',
'header'=>"Content-type: application/x-www-form-urlencoded
Cookie:cook1=c3;cook2=c4
"  .
"Content-Length: "  . strlen($data) . "
",
'content'=> $data
)
);
 
$context= stream_context_create($opts);
$html= fopen('http://www.test.com/zzzz.php?id=i3&id2=i4','rb',false, $context);
$w=fread($html,1024);
echo$w;
?>

方法5：用fsockopen函数打开url，以get方式获取完整的数据，包括header和body

<?php
functionget_url ($url,$cookie=false)
{
$url= parse_url($url);
$query= $url[path]."?".$url[query];
echo"Query:".$query;
$fp= fsockopen($url[host],$url[port]?$url[port]:80 , $errno,$errstr, 30);
if(!$fp) {
returnfalse;
}else{
$request= "GET $query HTTP/1.1
";
$request.= "Host: $url[host]
";
$request.= "Connection: Close
";
if($cookie)$request.="Cookie:   $cookie
";
$request.="
";
fwrite($fp,$request);
while(!@feof($fp)) {
$result.= @fgets($fp, 1024);
}
fclose($fp);
return$result;
}
}
//获取url的html部分，去掉header
functionGetUrlHTML($url,$cookie=false)
{
$rowdata= get_url($url,$cookie);
if($rowdata)
{
$body=stristr($rowdata,"

");
$body=substr($body,4,strlen($body));
return$body;
}
 
   returnfalse;
}
?>

方法6：用fsockopen函数打开url，以POST方式获取完整的数据，包括header和body

<?php
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/1.1
";
$request.="Host: ".$URL_Info["host"]."
";
$request.="Referer: $referer
";
$request.="Content-type: application/x-www-form-urlencoded
";
$request.="Content-length: ".strlen($data_string)."
";
$request.="Connection: close
";
 
   $request.="Cookie:   $cookie
";
 
   $request.="
";
$request.=$data_string."
";
 
   $fp= fsockopen($URL_Info["host"],$URL_Info["port"]);
fputs($fp,$request);
while(!feof($fp)) {
$result.= fgets($fp, 1024);
}
fclose($fp);
 
   return$result;
}
 
?>

方法7:使用curl库，使用curl库之前，可能需要查看一下php.ini是否已经打开了curl扩展

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