php获取指定网页内容

一、用file_get_contents函数,以post方式获取url

$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);

二、用file_get_contents以get方式获取内容

$url='http://www.domain.com/?para=123';

$html= file_get_contents($url);

echo$html;

?>

三、用fopen打开url, 以get方式获取内容

$fp= fopen($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}
":

echo"url body: $result";

fclose($fp);

?>

四、用fopen打开url, 以post方式获取内容

$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;

?>

五、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

$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;

?>

此类方法一共有三种

1. 第一种方法

$c = curl_init();

$url = 'www.badcatxt.com'; 

curl_setopt($c, CURLOPT_URL, $url); 

curl_setopt($c, CURLOPT_RETURNTRANSFER, 1);

$data = curl_exec($c);
curl_close($c);

$pos = strpos($data,'utf-8');

if($pos===false){$data = iconv("gbk","utf-8",$data);} 

preg_match("/", $lines_string, $title);

echo $title[1];

?>

第三种方法：使用file_get_contents

$content=file_get_contents("http://www.badcatxt.com/");

$pos = strpos($content,'utf-8');

if($pos===false){$content = iconv("gbk","utf-8",$content);}

$postb=strpos($content,'');

$length=$poste-$postb;

echo substr($content,$postb,$length);

?>

用正则表达式，是最快的，你看下面：

$url = 'http://www.baidu.com'; //这儿填页面地址
$info=file_get_contents($url);
preg_match('|