php curl的几段小应用

xmxm76

php 的CURL是不错的功能,下面收藏几段不错的片段
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);