php file_get_contents与curl()函数对比_PHP教程

$ch = curl_init("http://www.bKjia.c0m/");
curl_exec($ch);
curl_close($ch);

//$ch = curl_init("要采集的网址");  curl_init()函数的作用初始化一个curl会话

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//curl_exec($ch);执行$ch

//curl_close($ch); 关闭$ch

This is a test file with test text.

function curl_get_contents($url)  
{  
   $ch = curl_init();  
   curl_setopt($ch, CURLOPT_URL, $url);            //设置访问的url地址  
   //curl_setopt($ch,CURLOPT_HEADER,1);            //是否显示头部信息  
   curl_setopt($ch, CURLOPT_TIMEOUT, 5);           //设置超时  
   curl_setopt($ch, CURLOPT_USERAGENT, _USERAGENT_);   //用户访问代理 User-Agent  
   curl_setopt($ch, CURLOPT_REFERER,_REFERER_);        //设置 referer  
    curl_setopt($ch,CURLOPT_FOLLOWLOCATION,1);      //跟踪301  
    curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);        //返回结果  
    $r = curl_exec($ch);  
    curl_close($ch);  
    return $r;  
} 

1.2.31319094  
2.2.30374217  
3.2.21512604  
4.3.30553889  
5.2.30124092 

curl使用的时间：

1.0.68719101  
2.0.64675593  
3.0.64326  
4.0.81983113  
5.0.63956594 

 function vita_get_url_content($url) {
 if(function_exists('file_get_contents')) {
 $file_contents = file_get_contents($url);
 } else {
 $ch = curl_init();
 $timeout = 5; 
 curl_setopt ($ch, CURLOPT_URL, $url);
 curl_setopt ($ch, CURLOPT_RETURNTRANSFER, 1); 
 curl_setopt ($ch, CURLOPT_CONNECTTIMEOUT, $timeout);
 $file_contents = curl_exec($ch);
 curl_close($ch);
 }
 return $file_contents;
 }
 ?>