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：
具体代码如下：
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<?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>
<div 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 ";
}
?>
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希望本文所述对大家PHP程序设计有所帮助。