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:
$to_url=$_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"Upandrunning!";
}
else
{
echo"Woops,nothingfoundthere.";
}
//returnstrue,ifdomainisavailible,falseifnot
functionisDomainAvailible($domain)
{
//check,ifavalidurlisprovided
if(!filter_var($domain,FILTER_VALIDATE_URL))
{
returnfalse;
}
//initializecurl
$curlInit=curl_init($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);
//getanswer
$response=curl_exec($curlInit);
curl_close($curlInit);
if($response)returntrue;
returnfalse;
}
2、可以代替file_gecontents的操作
functionfile_get_contents_curl($url){
$ch=curl_init();
curl_setopt($ch,CURLOPT_HEADER,0);
curl_setopt($ch,CURLOPT_RETURNTRANSFER,1);//Setcurltoreturnthedatainsteadofprintingittothebrowser.
curl_setopt($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
functiongetImages($html){
$matches=array();
$regex='~http://somedomain.com/images/(.*?)\.jpg~i';
preg_match_all($regex,$html,$matches);
foreach($matches[1]as$img){
saveImg($img);
}
}
functionsaveImg($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
//openafilepointer
$file=fopen("/path/to/file","r");
//theurlcontainsmostoftheinfoneeded
$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);
//uploadrelatedoptions
curl_setopt($ch,CURLOPT_UPLOAD,1);
curl_setopt($ch,CURLOPT_INFILE,$fp);
curl_setopt($ch,CURLOPT_INFILESIZE,filesize("/path/to/file"));
//setforASCIImode(e.g.textfiles)
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);