一波PHP中cURL库的常见用法代码示例

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:

PHP;"> $to_url=$_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;"> 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;"> 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;"> 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;"> // 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

"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);

原文链接：https://www.f2er.com/php/19845.html