PHP获取网页内容的方法

简单的收集下PHP下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.myxzy.com'; 
$html = file_get_contents($url); 
echo $html; 
?>

方法2:用fopen打开url,以get方式获取内容。

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

方法3: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.myxzy.com'); 
curl_setopt ($ch, CURLOPT_RETURNTRANSFER, 1); 
curl_setopt ($ch, CURLOPT_CONNECTTIMEOUT, $timeout); 
$file_contents = curl_exec($ch); 
curl_close($ch); 
echo $file_contents; 
?>
方法4:用file_get_contents函数,以post方式获取url。
<?php 
$url = 'http://www.myxzy.com'; 
$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); 
echo $html;
?>
方法5:用fopen打开url,以post方式获取内容。
<?php 
$data = array ('foo' => 'bar', 'bar' => 'baz');
$data = http_build_query($data);
$context_options = array (
        'http' => array (
            'method' => 'POST',
            'header'=> "Content-type: application/x-www-form-urlencoded\r\n"
                . "Content-Length: " . strlen($data) . "\r\n",
            'content' => $data
            )
        );
$context = stream_context_create($context_options);
$html = fopen("http://www.myxzy.com",'r' ,false, $context);
$contents='';
while (!feof($html)) {$contents.= fread($html,13421779);}
echo $contents; 
?> 
方法6:用fsockopen函数打开url,获取完整的数据,包括header和body。
<?php 
$url = 'www.myxzy.com';
$fp = fsockopen($url,80,$errno,$errstr,30); 
if (!$fp){
	echo 'error';
} else { 
    $out = "GET / HTTP/1.1\r\n";
    $out .= "Host: www.myxzy.com\r\n";
    $out .= "Connection: Close\r\n\r\n";
    fwrite($fp, $out);
    while (!feof($fp)) {
        echo fgets($fp, 128);
    }
    fclose($fp);
}
?> 
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