1. 程式人生 > 實用技巧 >PHP獲取網頁內容的7種方法

PHP獲取網頁內容的7種方法

方法1: 用file_get_contents以get方式獲取內容

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

方法2:用file_get_contents函式,以post方式獲取url

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

如果需要再傳遞cookie資料,則把

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

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

修改為

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

"Content-Length: ".strlen($data) ."\r\n".

"cookie:cookie1=c1;cookie2=c2\r\n";

即可

方法3: 用fopen開啟url, 以get方式獲取內容

PHP
<?php
$fp= fopen($url,'r');
$header= stream_get_meta_data($fp);//獲取報頭資訊
while(!feof($fp)) {
$result.= fgets($fp, 1024);
}
echo"url header: {$header} <br>":
echo"url body: $result";
fclose($fp);
?>

方法4: 用fopen開啟url, 以post方式獲取內容

PHP
<?php
$data= array('foo2'=> 'bar2','foo3'=>'bar3');
$data= http_build_query($data);
 
$opts= array(
'http'=> array(
'method'=> 'POST',
'header'=>"Content-type: application/x-www-form-urlencoded\r\nCookie:cook1=c3;cook2=c4\r\n"  .
"Content-Length: "  . strlen($data) . "\r\n",
'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函式開啟url,以get方式獲取完整的資料,包括header和body

PHP
<?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\r\n";
$request.= "Host: $url[host]\r\n";
$request.= "Connection: Close\r\n";
if($cookie)$request.="Cookie:   $cookie\n";
$request.="\r\n";
fwrite($fp,$request);
while(!@feof($fp)) {
$result.= @fgets($fp, 1024);
}
fclose($fp);
return$result;
}
}
//獲取url的html部分,去掉header
functionGetUrlHTML($url,$cookie=false)
{
$rowdata= get_url($url,$cookie);
if($rowdata)
{
$body=stristr($rowdata,"\r\n\r\n");
$body=substr($body,4,strlen($body));
return$body;
}
 
   returnfalse;
}
?>

方法6:用fsockopen函式開啟url,以POST方式獲取完整的資料,包括header和body

PHP
<?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\n";
$request.="Host: ".$URL_Info["host"]."\n";
$request.="Referer: $referer\n";
$request.="Content-type: application/x-www-form-urlencoded\n";
$request.="Content-length: ".strlen($data_string)."\n";
$request.="Connection: close\n";
 
   $request.="Cookie:   $cookie\n";
 
   $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;
}
 
?>

方法7:使用curl庫,使用curl庫之前,可能需要檢視一下php.ini是否已經打開了curl擴充套件

PHP
<?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;
?>