PHP编程：一波PHP中cURL库的常见用法代码示例

《一波PHP中cURL库的常见用法代码示例》要点：
本文介绍了一波PHP中cURL库的常见用法代码示例，希望对您有用。如果有疑问，可以联系我们。

PHP 的CURL是不错的功能,下面收藏几段不错的片段PHP实例

0、基本例子
一般流程:
PHP实例

$to_url=$_GET['url'];
print_r($_GET);
if(substr($to_url,1)=='/'){
 $to_url="http://www.amazon.com".$to_url;
}
echo $to_url;
//初始化
$ch = curl_init();
//设置选项,包括URL
curl_setopt($ch,CURLOPT_URL,$to_url);
curl_setopt($ch,CURLOPT_RETURNTRANSFER,1);
curl_setopt($ch,CURLOPT_HEADER,0);
//执行并获取HTML文档内容
$output = curl_exec($ch);
$output=preg_replace("#href=\"#","href=\"http://in2.qq-ex.com/amazon.PHP?url=",$output);
// 释放curl句柄
curl_close($ch);
echo $output;
// 指定代理地址
curl_setopt($ch,CURLOPT_PROXY,'11.11.11.11:8080');
// 如果需要的话,提供用户名和密码
curl_setopt($ch,CURLOPT_PROXYUSERPWD,'user:pass');

1、测试网站是否运行正常 PHP实例

 if (isDomainAvailible('http://gz.itownet.cn')) 
  { 
    echo "Up and running!"; 
  } 
  else 
  { 
    echo "Woops,nothing found there."; 
  } 
 
  //returns true,if domain is availible,false if not 
  function isDomainAvailible($domain) 
  { 
    //check,if a valid url is provided 
    if(!filter_var($domain,FILTER_VALIDATE_URL)) 
    { 
      return false; 
    } 
 
    //initialize curl 
    $curlInit = curl_init($domain); 
    curl_setopt($curlInit,CURLOPT_CONNECTTIMEOUT,10); 
    curl_setopt($curlInit,true); 
    curl_setopt($curlInit,CURLOPT_NOBODY,true); 
 
    //get answer 
    $response = curl_exec($curlInit); 
 
    curl_close($curlInit); 
 
    if ($response) return true; 
 
    return false; 
  }

2、可以代替file_gecontents的操作 PHP实例

function file_get_contents_curl($url) { 
 $ch = curl_init(); 
 
 curl_setopt($ch,0); 
 curl_setopt($ch,1); //Set curl to return the data instead of printing it to the browser. 
 curl_setopt($ch,$url); 
 
 $data = curl_exec($ch); 
 curl_close($ch); 
 
 return $data; 
}

3、保存某个网站下的所有图片 PHP实例

 function getimages($html) { 
 $matches = array(); 
 $regex = '~http://somedomain.com/images/(.*?)\.jpg~i'; 
 preg_match_all($regex,$html,$matches); 
 foreach ($matches[1] as $img) { 
  saveImg($img); 
 } 
} 
 
function saveImg($name) { 
 $url = 'http://somedomain.com/images/'.$name.'.jpg'; 
 $data = get_data($url); 
 file_put_contents('photos/'.$name.'.jpg',$data); 
} 
 
$i = 1; 
$l = 101; 
 
while ($i < $l) { 
 $html = get_data('http://somedomain.com/id/'.$i.'/'); 
 getimages($html); 
 $i += 1; 
}

4、FTP应用 PHP实例

// open a file pointer 
$file = fopen("/path/to/file","r"); 
 
// the url contains most of the info needed 
$url = "ftp://username:password@mydomain.com:21/path/to/new/file"; 
 
$ch = curl_init(); 
 
curl_setopt($ch,$url); 
curl_setopt($ch,1); 
 
// upload related options 
curl_setopt($ch,CURLOPT_UPLOAD,1); 
curl_setopt($ch,CURLOPT_INFILE,$fp); 
curl_setopt($ch,CURLOPT_INFILESIZE,filesize("/path/to/file")); 
 
// set for ASCII mode (e.g. text files) 
curl_setopt($ch,CURLOPT_FTPASCII,1); 
 
$output = curl_exec($ch); 
curl_close($ch);

5、使用curl发送JSON数据
PHP实例

$data = array("name" => "Hagrid","age" => "36");                                   
$data_string = json_encode($data);                                           
  
$ch = curl_init('http://api.local/rest/users');                                    
curl_setopt($ch,CURLOPT_CUSTomrEQUEST,"POST");                                    
curl_setopt($ch,CURLOPT_POSTFIELDS,$data_string);                                  
curl_setopt($ch,true);                                    
curl_setopt($ch,CURLOPT_HTTPHEADER,array(                                      
  'Content-Type: application/json','Content-Length: ' . strlen($data_string))                                     
);                                                           
  
$result = curl_exec($ch);

PHP编程：一波PHP中cURL库的常见用法代码示例

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