php的URL重定向header()函数

// URL重定向
function redirect($url, $time=0, $msg=”) {
//多行URL地址支持
$url = str_replace(array(“＼n”, “＼r”), ”, $url);
if ( empty($msg) )
$msg = “系统将在{$time}秒之后自动跳转到{$url}！”;
if (!headers_sent()) {
// redirect
if (0 === $time) {
header(‘Location: ‘ . $url);
} else {
header(“refresh:{$time};url={$url}”);
echo($msg);
}
exit();
} else {
$str = “<meta http-equiv=’Refresh’ content=’{$time};URL={$url}’>”;
if ($time != 0)
$str .= $msg;
exit($str);
}
}
 
//url重定向2

function redirect($url) {
echo “<script>”.
“function redirect() {window.location.replace(‘$url’);}＼n”.
“setTimeout(‘redirect();’, 1000);＼n”.
“</script>”;
exit();
}

/**
 * get_redirect_url()
 * Gets the address that the provided URL redirects to,
 * or FALSE if there's no redirect.
 *
 * @param string $url
 * @return string
 */
function get_redirect_url($url){
 $redirect_url = null;
 
 $url_parts = @parse_url($url);
 if (!$url_parts) return false;
 if (!isset($url_parts['host'])) return false; //can't process relative URLs
 if (!isset($url_parts['path'])) $url_parts['path'] = '/';
 
 $sock = fsockopen($url_parts['host'], (isset($url_parts['port']) ? (int)$url_parts['port'] : 80), $errno, $errstr, 30);
 if (!$sock) return false;
 
 $request = "HEAD " . $url_parts['path'] . (isset($url_parts['query']) ? '?'.$url_parts['query'] : '') . " HTTP/1.1rn";
 $request .= 'Host: ' . $url_parts['host'] . "rn";
 $request .= "Connection: Closernrn";
 fwrite($sock, $request);
 $response = '';
 while(!feof($sock)) $response .= fread($sock, 8192);
 fclose($sock);
 
 if (preg_match('/^Location: (.+?)$/m', $response, $matches)){
  return trim($matches[1]);
 } else {
  return false;
 }
 
}
 
/**
 * get_all_redirects()
 * Follows and collects all redirects, in order, for the given URL.
 *
 * @param string $url
 * @return array
 */
function get_all_redirects($url){
 $redirects = array();
 while ($newurl = get_redirect_url($url)){
  if (in_array($newurl, $redirects)){
   break;
  }
  $redirects[] = $newurl;
  $url = $newurl;
 }
 return $redirects;
}
 
/**
 * get_final_url()
 * Gets the address that the URL ultimately leads to.
 * Returns $url itself if it isn't a redirect.
 *
 * @param string $url
 * @return string
 */
function get_final_url($url){
 $redirects = get_all_redirects($url);
 if (count($redirects)>0){
  return array_pop($redirects);
 } else {
  return $url;
 }
}

#cd /home/php5.2.1/ext/sockets
#/server/php/bin/phpize
#./configure --prefix=/usr/local/php/lib --with-php-config=/server/php/bin/php-config --enable-sockets
#make
#make install

再修改/usr/local/php/etc/php.ini文件
#extension_dir = "/usr/local/php/lib/php/extensions/no-debug-non-zts-20090626/" (php5.4版本以上不用加扩展路径)
extension=sockets.so

//POST提交
function socketPost($url,$data){
$postStr = '';
$postLen = '';
$out = '';
//解析域
$urlInfo = parse_url($url);
$host = $urlInfo['host'];
if(!isset($urlInfo['query'])) $urlInfo['query'] ='';
$path = $urlInfo['path'].'?'.$urlInfo['query'];
//组织数据
foreach($data as $key=>$value){
$postStr .=$key.'='.rawurlencode($value).'&';#这里需要对post的值进行编码，否则会出现中断
}
$postStr = trim($postStr,"&");
 
$postLen = strlen($postStr);
$fp = fsockopen($host, 80, $errno, $errstr, 3);
if ($fp) {
  
$out .="POST ".$path." HTTP/1.0＼r＼n";
$out .="Host: ".$host."＼r＼n";
$out .= "Content-type: application/x-www-form-urlencoded＼r＼n";
$out .= "Content-Length: ".$postLen."＼r＼n";   #这里最好加上Connection: close
$out .= "＼r＼n";
$out .= $postStr;
fwrite($fp, $out);
fclose($fp);

}

}

socketPost("提交的地址",array("username"=>"这里是post的username","password"=>321312312));

function socketGet($url){
$urlInfo = parse_url($url);
$host = $urlInfo['host'];
if(!isset($urlInfo['query'])) $urlInfo['query'] ='';
$path = $urlInfo['path'].'?'.$urlInfo['query'];
$fp = fsockopen($host, 80, $errno, $errstr, 3);
if ($fp) {
//调用模块进行抓取信息
$out = "GET {$path} / HTTP/1.1＼r＼n";
$out .= "Host: {$host}＼r＼n";
$out .= "Connection: Close＼r＼n＼r＼n";
fwrite($fp, $out);
fclose($fp);

}
}

.tag{ margin:0 0 20px; width:230px; height:234px;padding:10px; line-height:28px; overflow:hidden;}
.tag a{ padding:5px;}
.tag1{ font-size:12px;}
.tag2{ font-size:12px; color:#C60;}
.tag3{ font-size:12px; color:#F30;}
.tag4{ font-size:15px;}
.tag5{ font-size:15px; color:#090;}
.tag6{ font-size:15px; color:#990;}
.tag7{ font-size:18px;}
.tag8{ font-size:18px; color:#06F;}
.tag9{ font-size:18px; color:#09F;}
.tag10{ font-size:20px; }
.tag11{ font-size:20px; color:#6C0}
.tag12{ font-size:20px; color:#F96}

function getKeyZt($s,$e)
{
$sql = "select title from 你的数据表 order by  RAND() desc limit $s,$e";
$result=mysql_query($sql) or die(mysql_error());
while($rs=mysql_fetch_array($result))
{
//$c =
$class ='tag'.rand(1,12);
echo '<a href="/tags.php/'.urlencode($rs['title']).'/"><span class="'.$class.'">'.$rs['title'].'</span></a>';
}

}

<a href="/tags.php/%B1%E9%C0%FA%C4%BF%C2%BC/"><span class="tag11">遍历目录</span></a><a href="/tags.php/php+date/"><span class="tag7">php date</span></a><a href="/tags.php/mysql%CA%FD%BE%DD%BF%E2%D3%C5%BB%AF/"><span class="tag3">mysql数据库优化</span></a><a href="/tags.php/%CD%BC%C6%AC%B4%F3%D0%A1/"><span class="tag12">图片大小</span></a><a href="/tags.php/%D1%E9%D6%A4%B5%C7%C2%BC/"><span class="tag11">验证登录</span></a><a href="/tags.php/%CE%C4%BC%FE%CF%C2%D4%D8/"><span class="tag3">文件下载</span></a><a href="http://www.111cn.net//tags.php/js+%D5%FD%D4%F2%B1%ED%B4%EF%CA%BD/"><span class="tag6">js 正则表达式</span></a><a href="/tags.php/php%CA%FD%D7%E9/"><span class="tag7">php数组</span></a><a href="/tags.php/php+ajax/"><span class="tag4">php ajax</span></a>

/*
* 压缩数据
*/
public static function ob_gzip($content) // $content 就是要压缩的页面内容，或者说饼干原料
{  
    if(    !headers_sent() && // 如果页面头部信息还没有输出
        extension_loaded("zlib") && // 而且zlib扩展已经加载到PHP中
        strstr($_SERVER["HTTP_ACCEPT_ENCODING"],"gzip")) //而且浏览器说它可以接受GZIP的页面
    {
        $content = gzencode($content." OK",9); //此页已压缩”的注释标签，然后用zlib提供的gzencode()函数执行级别为9的压缩，这个参数值范围是0-9，0表示无压缩，9表示最大压缩，当然压缩程度越高越费CPU。
               
        //然后用header()函数给浏览器发送一些www.111cn.net头部信息，告诉浏览器这个页面已经用GZIP压缩过了！
        header("Content-Encoding: gzip");
        header("Vary: Accept-Encoding");
        header("Content-Length: ".strlen($content));
    }
        return $content; //返回压缩的内容，或者说把压缩好的饼干送回工作台。
}

<IfModule deflate_module>
 SetOutputFilter DEFLATE
 # Don’t compress images and other
 SetEnvIfNoCase Request_URI .(?:gif|jpe?g|png)$ no-gzip dont-vary
 SetEnvIfNoCase Request_URI .(?:exe|t?gz|zip|bz2|sit|rar)$ no-gzip dont-vary
 SetEnvIfNoCase Request_URI .(?:pdf|doc)$ no-gzip dont-vary
 AddOutputFilterByType DEFLATE text/html text/plain text/xml text/css
 AddOutputFilterByType DEFLATE application/x-javascript
</IfModule>

$encode = mb_detect_encoding($q, array('GB2312','GBK','UTF-8'));
echo $encode."<br/>";
if($encode=="GB2312")
{
    $q = iconv("GBK","UTF-8",$q);
}
else if($encode=="GBK")
{
    $q = iconv("GBK","UTF-8",$q);
}
else if($encode=="EUC-CN")
{
    $q = iconv("GBK","UTF-8",$q);
}
else//CP936
{
    //$q = iconv("GB2312","UTF-8",$q);
}

// 使用 iconv 转换并判断是否等值，效率不高
function is_utf8 ($str) {
    if ($str === iconv('UTF-8', 'UTF-8//IGNORE', $str)) {
        return 'UTF-8';
    }
}
// 多种编码的情况
function detect_encoding ($str) {
    foreach (array('GBK', 'UTF-8') as $v) {
        if ($str === iconv($v, $v . '//IGNORE', $str)) {
            return $v;
        }
    }
}

$encode = mb_detect_encoding($keytitle, array('ASCII','GB2312′,'GBK’,'UTF-8');