这篇文章主要介绍了一波PHP中cURL库的常见用法代码示例,类Unix世界的cURL内置于PHP中,使Linux和Mac OS用户倍感亲切,需要的朋友可以参考下

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 = '~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

// 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);