• Source 
    1. echo $backurl;
    2.  
    3. function shortenSinaUrl($long_url){
    4.  $apiKey='209678993';
    5.  $apiUrl='http://api.t.sina.com.cn/short_url/shorten.json?source='.$apiKey.'&url_long='.$long_url;
    6.  $curlObj = curl_init();
    7.  curl_setopt($curlObj, CURLOPT_URL, $apiUrl);
    8.  curl_setopt($curlObj, CURLOPT_RETURNTRANSFER, 1);
    9.  curl_setopt($curlObj, CURLOPT_SSL_VERIFYPEER, 0);
    10.  curl_setopt($curlObj, CURLOPT_HEADER, 0);
    11.  curl_setopt($curlObj, CURLOPT_HTTPHEADER, array('Content-type:application/json'));
    12.  $response = curl_exec($curlObj);
    13.  curl_close($curlObj);
    14.  $json = json_decode($response);
    15.  return $json[0]->url_short;
    16. }
    17.  
    18. function expandSinaUrl($short_url){
    19.  $apiKey='209678993';
    20.  $apiUrl='http://api.t.sina.com.cn/short_url/expand.json?source='.$apiKey.'&url_short='.$short_url;
    21.  $curlObj = curl_init();
    22.  curl_setopt($curlObj, CURLOPT_URL, $apiUrl);
    23.  curl_setopt($curlObj, CURLOPT_RETURNTRANSFER, 1);
    24.  curl_setopt($curlObj, CURLOPT_SSL_VERIFYPEER, 0);
    25.  curl_setopt($curlObj, CURLOPT_HEADER, 0);
    26.  curl_setopt($curlObj, CURLOPT_HTTPHEADER, array('Content-type:application/json'));
    27.  $response = curl_exec($curlObj);
    28.  curl_close($curlObj);
    29.  $json = json_decode($response);
    30.  return $json[0]->url_long;
    31. }
    32.  
    33.  
    34. function shorturl($long_url){
    35.     $apiKey='209678993';
    36. 	$apiUrl='http://api.t.sina.com.cn/short_url/shorten.json?source='.$apiKey.'&url_long='.$long_url;
    37. 	$response = file_get_contents($apiUrl);
    38. 	$json = json_decode($response);
    39. 	return $json[0]->url_short;
    40. }
    41.  
    42. function expandurl($short_url){
    43. 	$apiKey='209678993';
    44. 	$apiUrl='http://api.t.sina.com.cn/short_url/expand.json?source='.$apiKey.'&url_short='.$short_url;
    45.  
    46. 	$response = file_get_contents($apiUrl);
    47. 	$json = json_decode($response);
    48. 	return $json[0]->url_long;
    49. }
    50. ?>