学习php简单实现短网址(短链)还原的方法

本文实例讲述了php简单实现短网址还原的方法。分享给大家供大家参考，具体如下：

相关学习推荐：php编程（视频）

具体代码如下：

<?php $info1 = '亲！暂不能解析此类短网址。'; $info2 = '亲！网址解析失败，请重试。'; $info3 = '<br/><b><a href="'; $info4 = '" target="_blank">立即访问>></a></b>'; $info5 = '亲！不是短网址或无效。'; function unshort($url) { global $info1,$info2,$info3,$info4;  $curl = curl_init();  curl_setopt($curl, CURLOPT_URL, $url);  curl_setopt($curl, CURLOPT_RETURNTRANSFER,1);  curl_setopt ($curl, CURLOPT_USERAGENT, 'Mozilla/8.0 (compatible; MSIE 8.0; Windows 7');  curl_setopt($curl, CURLOPT_HEADER, 1);  curl_setopt($curl, CURLOPT_NOBODY, 0);  curl_setopt($curl, CURLOPT_TIMEOUT, 15);  curl_setopt($curl,CURLOPT_ENCODING, 'gzip');  $data = curl_exec($curl);  if(!empty($data)){  $message = curl_getinfo($curl);   curl_close($curl);    $status = $message['http_code'];    if ($status == '301' || $status == '302' ){     $UrlHeader = (get_headers($url,1));     $unurl = $UrlHeader[Location];     if(is_array($unurl)) {      $unurl = $unurl[0];      $unurl .=$info3.$unurl.$info4;      return $unurl;      }     else {     $unurl .=$info3.$unurl.$info4;     return $unurl;     }    }   return $info1;  }  return $info2; } function adfunshort($url) { global $info3,$info4,$info5;  $c = file_get_contents($url);  $p = "/url = '(.*)';/isU";  preg_match($p, $c, $content);  $unurl = $content[1];  if($unurl == '') {   return $info5;  }  else {   $unurl .=$info3.$unurl.$info4;   return $unurl;  } } ?> <form action="" method="post"> 短网址：<input type="text" name="turl" class="inurl" size="26" /> <input type="hidden" name="url_done" value="done" /> <input type="submit" value="提交" class="suburl" /> </form> <p id="trurl"> <?php $turl = $_POST['turl']?$_POST['turl']:""; $url_done= $_POST['url_done']?$_POST['url_done']:""; if ($url_done == 'done'){ $http = substr($turl,0,7);  if ($http != 'http://' && $http != 'https:/'){   $turl = 'http://'.$turl;   }   $tturl = substr($turl,0,11);   if ($tturl == 'http://adf.'){   $longurl = adfunshort($turl);   }else {   $longurl = unshort($turl);  }echo "短网址 ".$turl." 的真实网址为：<br />$longurl "; } ?>

相关学习推荐：编程视频

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