一波PHP中cURL库的常见用法代码示例_php实例

php 的CURL是不错的功能,下面收藏几段不错的片段

0、基本例子
一般流程:

$to_url=$_GET['url'];
print_r($_GET);
if(substr($to_url,0,1)=='/'){
 $to_url="http://www.amazon.com".$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

 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,CURLOPT_HEADER,true);
    curl_setopt($curlInit,CURLOPT_NOBODY,true);
    curl_setopt($curlInit,CURLOPT_RETURNTRANSFER,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

function file_get_contents_curl($url) {
 $ch = curl_init(); 

 curl_setopt($ch, CURLOPT_HEADER, 0);
 curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1); //Set curl to return the data instead of printing it to the browser.
 curl_setopt($ch, CURLOPT_URL, $url); 

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

 return $data;
} 

3、保存某个网站下的所有图片

 function getImages($html) {
 $matches = array();
 $regex = '~yun_qi_img/(.&~i';
 preg_match_all($regex, $html, $matches);
 foreach ($matches[1] as $img) {
  saveImg($img);
 }
} 

function saveImg($name) {
 $url = 'yun_qi_img/'.$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

// 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, CURLOPT_URL, $url);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 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

$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, CURLOPT_RETURNTRANSFER, true);
curl_setopt($ch, CURLOPT_HTTPHEADER, array(
  'Content-Type: application/json',
  'Content-Length: ' . strlen($data_string))
);                                                           

$result = curl_exec($ch); 

以上是小编为您精心准备的的内容，在的博客、问答、公众号、人物、课程等栏目也有的相关内容，欢迎继续使用右上角搜索按钮进行搜索curl
php
curl推送示例、百度curl推送示例、curl示例、curl推送示例详细步骤、curl请求示例，以便于您获取更多的相关知识。