Some little things written in PHP_PHP tutorial-PHP Tutorial-php.cn

Some little things may come in handy sometimes!

1. Get the client IP address

function getip(){
if (! empty($_SERVER ["HTTP_X_FORWARDED_FOR"])){ //Use proxy
$tip = split(",", $_SERVER["HTTP_X_FORWARDED_FOR"]);
$cip = $tip[0];
}
else
$cip = $_SERVER["REMOTE_ADDR"];[
return dechex(ip2long($cip));
}

2.ses sion control Functions

function session_begin(){
global $userid, $sid, $ip, $session, $db, $islogin;
$ip = getip();
/* In the short term, the system needs to support cookies by default. */
if (!isset($_COOKIE['userid'])) return false;
else $userid = $_COOKIE['userid'];
if (!isset($_COOKIE['sid'])) return false;
else $sid = $_COOKIE['sid'];
/* Returning false above means the user is not logged in, the page Will jump to the homepage (login page). */

$query = "SELECT * FROM user WHERE nickname = '$userid'";
$result = $db->sql_query($query ; The preserved non -kissing*/
if ($ row ['latloginip']! = $ IP) Return false; 🎜>} Else Return false;/*Without this userid*/
$ session = $ row;
// $ session [''] = $ row ['']; $row);

$islogin = true;
return true;
}

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

3. The voting procedure for the beauty pageant

header("Refresh:0;url=./"); //Refresh in one second
?>
<script>alert('<?php <br>require_once('mysql.php' ); <br>require_once('functions.php'); <BR>$db = new sql_db('localhost','root','','selectmm'); <BR>$user_id = $_GET['user_id ']; <BR>$ip = getip(); <BR>$deltime = time()-3600; //Subtract one hour <BR>$sql = "delete from vote where time <$deltime"; / /Delete expired data <BR>$db->sql_query($sql); <br><br>$sql = "select ip from vote where ip='$ip' and user_id='$user_id'"; //Check whether it has been submitted within one hour <br>$linkid=$db->sql_query($sql) or die(mysql_error()); <br>$count=$db->sql_affectedrows(); <br>if($count) <br>{ <br>echo "You have already voted!"; <br>} <br>else <br>{ <br>$sql = "update user set vote_count=vote_count+1 WHERE user_id='$user_id'"; <br>$db->sql_query($sql ); <br>$count=$db->sql_affectedrows(); <br>if($count) <br>{ <br> echo "The vote was successful! "; <br> $sql = "insert into vote (`ip`,`user_id`,`time`) values ('$ip','$user_id','".time()."')";/ /Insert a record if the vote is successful.<br> $db->sql_query($sql); <br><br>} <br>else <br>{ <br> echo "Vote failed!"; <br>} <br><br>} <br>?>'); <br>//history.back(); <br></script>

4.smarty的搜索程序

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 ""; }
   $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 "删除该用户";

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

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']."
";
fwrite($fp,$str);
}
?>

8.验证码

/*
* 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);
?>