一些PHP写的小东西

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我是靠谱客的博主开朗电话，最近开发中收集的这篇文章主要介绍一些PHP写的小东西，觉得挺不错的，现在分享给大家，希望可以做个参考。

概述

一些小东西有时候可能用得上!

1.得到客户端IP地址

function getip(){
       if (! empty($_SERVER["HTTP_X_FORWARDED_FOR"])){ //使用代理的情况
               $tip = split(",", $_SERVER["HTTP_X_FORWARDED_FOR"]);
               $cip = $tip[0];
       }
       else
               $cip = $_SERVER["REMOTE_ADDR"];[
       return dechex(ip2long($cip));
}

2.session控制的函数

function session_begin(){
       global $userid, $sid, $ip, $session, $db, $islogin;
       $ip = getip();
       /* 短期而言,系统默认需要支持cookie. */
       if (!isset($_COOKIE['userid'])) return false;
       else $userid = $_COOKIE['userid'];
       if (!isset($_COOKIE['sid'])) return false;
       else $sid = $_COOKIE['sid'];
       /* 以上返回false意味着用户没有登陆,页面将跳转至首页(登陆页). */

       $query = "SELECT * FROM user WHERE nickname = '$userid'";
       $result = $db->sql_query($query);
       if ($row = $db->sql_fetchrow($result)){
               if ($row['sid'] != $sid) return false; /* cookie传送的sid和数据库保存的不吻合 */
               if ($row['lastloginip'] != $ip) return false; /* IP不吻合 */
               /* 是否要考虑 session的过期问题呢? */
       }
       else return false; /* 没有这个userid */
       $session = $row;
//        $session[''] = $row[''];
       unset($row);

       $islogin = true;
       return true;
}

/* bool session_end(int $userid, string $sid) */
function sesssion_end($userid, $sid){
       return true;
}

3.做选美的投票程序

<?php
header("Refresh:0;url=./");  //一秒刷新
?>
<script>alert('<?php
require_once('mysql.php');
require_once('functions.php');
$db = new sql_db('localhost','root','','selectmm');
$user_id = $_GET['user_id'];
$ip = getip();
$deltime = time()-3600;  //减去一小时
$sql = "delete from vote where time <$deltime"; //删除掉过期的数据
$db->sql_query($sql);

$sql = "select ip from vote where ip='$ip' and user_id='$user_id'"; //查看一小时内是否投过
$linkid=$db->sql_query($sql) or die(mysql_error());
$count=$db->sql_affectedrows();
if($count)
{
echo "您已经投过票了！";
}
else
{
$sql = "update user set vote_count=vote_count+1 WHERE user_id='$user_id'";
$db->sql_query($sql);
$count=$db->sql_affectedrows();
if($count)
{
echo "投票成功！";
    $sql = "insert into vote (`ip`,`user_id`,`time`) values ('$ip','$user_id','".time()."')";//投票成功就插入一条记录。
    $db->sql_query($sql);

}
else
{
echo "投票失败！";
}

}
?>');
//history.back();
</script>

4.smarty的搜索程序

<?php
require_once('mysql.php');
$db = new sql_db('localhost','root','','selectmm');
require_once('functions.php');
require_once('session.php');
session_begin();
require('./Libs/Smarty.class.php');
$smarty = new Smarty;
$title = "首页";
$smarty->assign("islogin",$islogin);
$smarty->assign("title",$title);
$age=$_GET['age'];
$arr=explode(',',$age);
$y=date('Y');
$md=date('-m-d');
$begin=($y-$arr[1]).$md;
$end=($y-$arr[0]).$md;
$sql="select p.* from pic_info p,user u where p.user_id=u.user_id and u.birthday between '$begin' and '$end' group by u.user_id";
$link=$db->sql_query($sql) or die(mysql_error());
$row = $db->sql_fetchrowset($link);
$db->sql_freeresult();
$smarty->assign("pic",$row);
$smarty->display('index.tpl.htm');
?>

5.注册程序

<?
require('mysql.php');
$str=new sql_db('localhost','root','','selectmm');
$METHOD = $_POST;
   if (isset($METHOD['nickname']) && $METHOD['nickname'] != '') $nickname = $METHOD['nickname'];
  else { echo "<script>alert("用户昵称不能为空.")</script>"; echo "<script>location="register.php"</script>"; }
   if (isset($METHOD['password']) && strlen($METHOD['password'])>=6) $password = $METHOD['password'];
  else { echo "<script>alert("密码至少6位")</script>"; echo "<a href='javascript：history.go(-2);'>"; }
   $password2 = $METHOD['password2'];
   if ($password != $password2)
  { echo "<script>alert("两次输入密码不一致")</script>"; echo "<script>location="register.php"</script>"; }
   if (isset($METHOD['name']) && $METHOD['name'] != '') $name = $METHOD['name'];
  else { echo "<script>alert("用户名不能为空.")</script>"; echo "<script>location="register.php"</script>"; }
    $birthday=$METHOD['Year'].$METHOD['Month'].$METHOD['Day'];
    $stature = $METHOD['stature'];
    $astrology = $METHOD['astrology'];
    $bloodtype = $METHOD['bloodtype'];
    $goodat = $METHOD['goodat'];
    $work = $METHOD['work'];
    $educate = $METHOD['educate'];
    $homeplace = $METHOD['homeplace'];
    $address = $METHOD['address'];
    $tel = $METHOD['tel'];
    $qq = $METHOD['qq'];
   if (isset($METHOD['email']) && $METHOD['email'] != '') $email = $METHOD['email'];
  else { echo "<script>alert("Email不能为空")</script>"; echo "<script>location="register.php"</script>"; }
   if (!eregi("^[0-9a-z.-_]+@[0-9a-z.]+.[a-z]$",$email)) { echo "<script>alert("电子邮件格式不合法")</script>"; echo "<script>location="register.php"</script>"; }
     $dian =$METHOD['dian'];
   if (isset($METHOD['myself']) && $METHOD['myself'] != '') $myself = $METHOD['myself'];
  else { echo "<script>alert("用.....不能为空")</script>"; echo "<script>location="register.php"</script>"; }
   if(isset($METHOD['enounce'])&& $METHOD['enounce']!='')$enounce = $METHOD['enounce'];
   else { echo "<script>alert(".....不能为空")</script>"; echo "<script>location="register.php"</script>"; }

   $query = "SELECT * FROM user WHERE nickname ='$nickname' or email='$email'";
   $result = $str->sql_query($query)or die(mysql_error()); ;
   if ($row = $str->sql_fetchrow($result))
    { echo "<script>alert("对不起，该用户已经注册")</script>"; echo "<script>location="register.php"</script>"; }
   $password = md5($password);
   $query = "INSERT INTO `user` (`nickname`,`password`,`name`,`birthday`,`astrology`,`bloodtype`,`stature`,`goodat`,`work`,`educate`,`homeplace`,`address`,`tel`,`email`,`qq`,`dian`,`myself`,`enounce`) VALUES('$nickname','$password','$name','$birthday','$astrology','$bloodtype','$stature','$goodat','$work','$educate','$homeplace','$address','$tel','$email','$qq','$dian','$myself','$enounce')";
if($str->sql_query($query))
     $str->sql_close();
   echo "<script>alert("恭喜你，注册成功")</script>";

   echo "<script>location="login.php"</script>";
?>

6.提交参数 JS控制

echo "<td><a href='delete.php?nickname=' onclick="return confirm('确定删除吗?rn此操作不可恢复')"><font color=red>删除该用户</font></a></td>";

7.在给同事做一个文本处理,两个文档一个有7万条记录,开始用嵌套循环,php死了,后面用数组解决了问题

<?php
if(($fp=fopen("1.txt","a+"))===false)
  {
          die("打开文件失败");
  }
$data1=file("old.txt") or die("打开文件失败");
$data2=file("sports.txt") or die("打开文件失败");
foreach($data1 as $data)
{
$x = split("[./]",$data);
$name = $x[count($x)-2];
$a[$name]['md5']=$data;
}
foreach($data2 as $data)
{
$x = split("[,./]",$data);
$name = $x[count($x)-2];
if(isset($a[$name]))
$a[$name]['name']=$x[0];
}
foreach($a as $value)
{
$str=$value['md5'].','.$value['name'];
fwrite($fp,$str);
echo $value['md5'].','.$value['name']."<br>";
fwrite($fp,$str);
}
?>

8.验证码

<?php
/*
* Filename:authimg.php
*/

Header("Content-type:image/PNG");
session_start();
$auth_num = "";
/*创建一个基于调色板的图像*/
$im = imagecreate(63, 20);
/*初始化一个随机种子*/
srand((double)microtime() * 1000000);
$auth_num_k = md5(rand(0, 9999));
$auth_num = substr($auth_num_k, 17, 5);
/*赋值会话变量*/
$_SESSION['authnum'] = $auth_num;
$black = ImageColorAllocate($im, 0, 0, 0);
$white = ImageColorAllocate($im, 255, 255, 255);
$gray = ImageColorAllocate($im, 200, 200, 200);
ImageFill($im, 63, 20, $black);
imagestring($im, 5, 10, 3, $auth_num,$gray);

for ($i = 0;$i < 200;$i++){
       $randcolor = ImageColorallocate($im, rand(0,255), rand(0,255), rand(0,255));
       imagesetpixel($im, rand()%70, rand()%30, $randcolor);
}
ImagePNG($im);
ImageDestroy($im);
?>