functions.php

基于php+mysql多用户多风格防刷新计数器

<?php
	//
	// Copyright (c) 2004 All rights reserved.
	// Author: andy_lue (xidian university)
	// email: [e-mail]
	//
	function mylink(){
		$link = mysql_pconnect('localhost','ajak','');
		@mysql_select_db('mydata');
		return $link;
	}
	function exist($uid){
		$link = mylink();
		$sql = "select * from counter where uid = '$uid'";
		$do = mysql_query($sql,$link);
		$rows = mysql_num_rows($do);
		if($rows == '0')
			return false;
		else 
			return true;
	}
	function reg_user($uid,$pass){
		$link = mylink();
		if(exist($uid)){
			return false;
		}
		else{
			$mypass = md5($pass);
			$regdate = date('Y-m-d');
			$sql = "insert into `counter`(uid,pass,regdate) values('$uid','$mypass','$regdate')";
			return mysql_query($sql,$link) ? true : false;
		}
	}
	function del_user($uid){
		$link = mylink();
		$sql = "delete from counter where uid = '$uid'";
		return mysql_query($sql,$link) ? true : false;
	}
	function update_user($uid,$pass,$visits) {
		if(!exist($uid)) {
			return false;
		}
		else {
			$link = mylink();
			$sql = "update counter set pass = '$pass',visits = '$visits' where uid = '$uid'";
			return mysql_query($sql,$link) ? true : false;
		}
	}
	function check_user($uid,$pass){
		$link = mylink();
		if(!exist($uid)) {
			return false;
		}
		else {
			$sql = "select pass from counter where uid = '$uid'";
			$do = mysql_query($sql,$link);
			$result = mysql_fetch_assoc($do);
			if( md5($pass) <> $result['pass']){
				return false;
			}
			else {
				return true;
			}
		}
	}
	function check_me($uid){
		$link = mylink();
		$sql = "select lastvtime,vdate,ip from counter where uid = '$uid'";
		$do = mysql_query($sql,$link);
		$result = mysql_fetch_assoc($do);
		$result['lastvtime'];
		$currentime = date("His");
		$thisip = getenv('REMOTE_ADDR');
		if(($currentime - $result['lastvtime']) >= 500 || ($currentime - $result['lastvtime']) <=0 || $result['ip'] <> $thisip || $result['vdate'] <> date('Y-m-d')) {
			return true;
		}
		else
			return false;
	}
	function display($uid){
		$link = mylink();
		if(!exist($uid)) return false;
		elseif(check_me($uid)){
			$lv = date('His');
			$vdate = date('Y-m-d');
			$thisip = getenv('REMOTE_ADDR');
			$update = "update `counter` set visits = visits + 1,lastvtime = '$lv',ip = '$thisip',vdate = '$vdate' where uid = '$uid'";
			@mysql_query($update,$link);
			$select = "select visits from counter where uid = '$uid'";
			$s_do = mysql_query($select,$link);
			$s_re = mysql_fetch_assoc($s_do);
			return $s_re['visits'];
		}
		else {
			$select = "select visits from counter where uid = '$uid'";
			$s_do = mysql_query($select,$link);
			$s_re = mysql_fetch_assoc($s_do);
			return $s_re['visits'];
		}
	}
	function count_me($uid,$style,$bits){
		$host="http://192.168.0.2/php/counter"; //images' root file path, which is required...
		$str = display($uid);
		$len = strlen($str);
		$zeros = $bits - $len;
		for($z=0;$z < $zeros; $z++){
			echo "document.write(\"<img src='$host/$style/c0.gif'>\");";
		}
		for( $i = 0 ; $i < $len ; $i++ ){
			$cut = substr($str,$i,1);
			switch($cut){
				case '1':echo"document.write(\"<img src='$host/$style/c1.gif'>\");"; break;
				case '2':echo"document.write(\"<img src='$host/$style/c2.gif'>\");"; break;
				case '3':echo"document.write(\"<img src='$host/$style/c3.gif'>\");"; break;
				case '4':echo"document.write(\"<img src='$host/$style/c4.gif'>\");"; break;
				case '5':echo"document.write(\"<img src='$host/$style/c5.gif'>\");"; break;
				case '6':echo"document.write(\"<img src='$host/$style/c6.gif'>\");"; break;
				case '7':echo"document.write(\"<img src='$host/$style/c7.gif'>\");"; break;
				case '8':echo"document.write(\"<img src='$host/$style/c8.gif'>\");"; break;
				case '9':echo"document.write(\"<img src='$host/$style/c9.gif'>\");"; break;
				default:echo"document.write(\"<img src='$host/$style/c0.gif'>\");";
			}
		}
	}
?>