php获取根域名几个示例

<?
//获取当前的域名:
echo $_SERVER['SERVER_NAME'];
//获取来源网址,即点击来到本页的上页网址
echo $_SERVER["HTTP_REFERER"];
$_SERVER['REQUEST_URI'];//获取当前域名的后缀
$_SERVER['HTTP_HOST'];//获取当前域名
dirname(__FILE__);//获取当前文件的物理路径
dirname(__FILE__)."/../";//获取当前文件的上一级物理路径
?>

function getUrlRoot($url){

        #添加头部和尾巴
        $url = $url . "/";
        #判断域名
        preg_match("/((＼w*):＼/＼/)?＼w*＼.?([＼w|-]*＼.(com.cn|net.cn|gov.cn|org.cn|com|net|cn|org|asia|tel|mobi|me|tv|biz|cc|name|info))
＼//", $url, $ohurl);
        #判断IP
        if($ohurl[3] == ''){
                preg_match("/((＼d+＼.){3}＼d+)＼//", $url, $ohip);
                return $ohip[1];
        }
        return $ohurl[3];
}

/**
 * 取得根域名
 * @param type $domain 域名
 * @return string 返回根域名
 */
function GetUrlToDomain($domain) {
    $re_domain = '';
    $domain_postfix_cn_array = array("com", "net", "org", "gov", "edu", "com.cn", "cn");
    $array_domain = explode(".", $domain);
    $array_num = count($array_domain) - 1;
    if ($array_domain[$array_num] == 'cn') {
        if (in_array($array_domain[$array_num - 1], $domain_postfix_cn_array)) {
            $re_domain = $array_domain[$array_num - 2] . "." . $array_domain[$array_num - 1] . "." . $array_domain[$array_num];
        } else {
            $re_domain = $array_domain[$array_num - 1] . "." . $array_domain[$array_num];
        }
    } else {
        $re_domain = $array_domain[$array_num - 1] . "." . $array_domain[$array_num];
    }
    return $re_domain;
}

<?
//数据库连接就不写在这里面了
$s = isset( $_GET['s'] )?$_GET['s']:0;
$e = isset( $_GET['e'])?$_GET['e']:50;
$count =85000;

if( $s < $count )
{
 $sql = "select * from 表前缀_info where isget =0 order by id desc limit $s,$e ";
 $query = mysql_query( $sql );
 while( $rs = mysql_fetch_array( $query ) )
 {
  $id = $rs['id'];
  $sss = $rs['sss'];
  $typeid = $rs['typeid'];
  $isget = $rs['isget'];
  $sql = "insert into 表前缀_info_bak (id,表前缀,typeid,isget) values('$id','$sss','$typeid','$isget')";
  mysql_query( $sql ) ;
  echo $sql;
  //exit;
  $sqlu = "update 表前缀_info set isget=1 where id =".$rs['id'];
  mysql_query( $sqlu );
 }
 echo '<meta http-equiv="refresh" content="0;url=rand.php?s='.($s+50).'&e=50">正在处理数据，当前为'.$s.'条．．．．．．';
}
else
{
 echo '完成所有数据处理 <a href=rand.php>再随机排序一次</a>';
}
?>

<?php
$d=2; //变量d赋值
if($d==1){
 echo "数字1"; //变量d等于1时输出的值
}else{
 echo "数字不是1"; //不等于1时输出的值
}
?>

<?php
switch ($x)
{
case 1:
  echo "Number 1";
  break;
case 2:
  echo "Number 2";
  break;
case 3:
  echo "Number 3";
  break;
default:
  echo "No number between 1 and 3";
}
?>

<?php
//php5.3
class Model
{
public static function find()
{
echo __STATIC__;
}
}
class Product extends Model {}
class User extends Model {}
Product::find(); // “Product”
User::find(); // “User”
?>

<?php
/*

最简单字符串匹配算法php实现方式

 
T: ababcabc

P: abc

 
0.          1.          2.

ababcabc    ababcabc    ababcabc

|||          |||          |||

abc          abc          abc

(X)          (X)          (O)

 
3.          4.          5.

ababcabc    ababcabc    ababcabc

   
|||          |||          |||

   
abc          abc          abc

   
(X)          (X)          (O)

*/

 
$str="ababcabc";
$search="abc";
 
$strlen=strlen($str);
$searchlen=strlen($search);
 
//1.遍历$str字符串

for($i=0;$i<$strlen;$i++){
    if($i+$searchlen>$strlen){
        echo '超出长度';break;
    }
 
    $match=true;
 
    
//2.遍历要搜索的字符串$search，进行对比

    for($j=0;$j<$searchlen;$j++){
 
        if($str[$i+$j]!=$search[$j]){
            $match=false;
            break;
        }
        $k=$i+$j;
        if($match){
            if($j==$searchlen-1){
                echo "{$str}第{$i}个位置开始为{$search}＼n";break;
            }
        }
 
    }
 
}
 
?>