Some little things written in PHP_PHP tutorial

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        $randcolor = ImageColorallocate($im, rand(0,255), rand(0,255), rand(0,255)); 
       imagesetpixel($im, rand()%70, rand()%30, $randcolor); 
} 
ImagePNG($im); 
ImageDestroy($im); 
?>

http://www.bkjia.com/PHPjc/317307.htmlwww.bkjia.comtruehttp: //www.bkjia.com/PHPjc/317307.htmlTechArticleSome little things may be useful sometimes! 1. Get the client IP address functiongetip(){ if(! empty($_SERVER["HTTP_X_FORWARDED_FOR"])){//Using a proxy $tip=split(",",$_SERVER["HTT...