练习php小项目：简单的雇员管理系统
这是一个简单的php练习小项目，因为比较简单所以就没有用Smarty模板去把这个项目彻底的输入，处理，输出分离，只是简单的用MVC的设计模式去写的。这个项目主要是为了练习Cookie和Session的使用。
数据库用的是MySQL，建了一个empmanage的数据库，里面有两张表。如图：
表的结构如图：
这是登陆界面，因为主要想练习后台相关知识，所以前台页面写的比较简单。实际上是先写的index.php，里面就只是一个跳转。
index.php
<?php
header("Location:login.php");
?>
login.php
<html>
<head>
<meta http-equiv="content-type" content="text/html;charset=utf-8">
<title>emp_system</title>
</head>
<?php require_once 'common.php';?>
<h1>emp login</h1>
<form action="loginProcess.php" method="post">
用户名<input type="text" name="username" value="<?php echo getCookie("username")?>"/><br/>
密码 <input type="password" name="password"/><br/>
sava cookie<input type="checkbox" name="cookie"/><br/>
<input type="submit" value="登陆"/>
</form>
<?php
if(!empty($_GET['errNo'])){
$errNo=$_GET['errNo'];
echo "<br/><font color='red'>输入的密码或用户名错误，错误信息</font>".$errNo;
}
?>
</html>
login.php中require_once的common.php
<?php
function getLastTime(){
date_default_timezone_set ( 'UTC' );
if(!empty($_COOKIE)){
echo "上次登录时间：".$_COOKIE['last_visit_time'];
setcookie("last_visit_time",date("Y-m-d H:i:s"),time()+24*3600);
}else{
echo "第一次登录";
setcookie("last_visit_time",date("Y-m-d H:i:s"),time()+24*3600);
}
}
function getCookie($key){
if(!empty($_COOKIE[$key])){
return $_COOKIE[$key];
}else{
return "";
}
}
function checkUserLegal(){
session_start();
if(empty($_SESSION['id'])){
header("Location:login.php?errNo=1");
}
}
?>
login.php中表单提交到loginProcess.php去。
<?php
require_once 'adminService.class.php';
if(!empty($_POST['cookie'])){
if(!empty($_POST['username'])){
$username=$_POST['username'];
setcookie("username","$username",time()+300);
}
if(!empty($_POST['password'])){
$password=$_POST['password'];
setcookie("password","$password",time()+300);
}
}else{
if(!empty($_POST['username'])){
$username=$_POST['username'];
}
if(!empty($_POST['password'])){
$password=$_POST['password'];
}
}
$adminService=new adminService();
if($id=$adminService->checkUser($username, $password)){
//合法
session_start();
$_SESSION['id']=$id;
header("Location:Main.php?id=$id");
exit();
}else{
//非法
header("Location:login.php?errNo=2");
exit();
}
?>
loginProcess中require_once的adminService.class.php。
<?php
require_once 'SqlHelper.class.php';
class adminService{
//验证用户是否合法
public function checkUser($username,$password){
$sqlHelper=new SqlHelper();
$sql="select password,id from admin where name='".$username."'";
$res=$sqlHelper->execute_dql($sql);
if($row=mysql_fetch_assoc($res)){
if($row['password']==md5($password)){
$id=$row['id'];
return $id;
}else{
return null;
}
}else{
return null;
}
//释放资源
mysql_free_result($res);
//关闭连接
$sqlHelper->close_connent();
}
}
?>
adminService.class.php中require_once的SqlHelper.class.php。
<?php
class SqlHelper{
public $conn;
public $dbname="empmanage";
public $host="localhost";
public $username="root";
public $password="root";
public function __construct(){
$conn=mysql_connect($this->host,$this->username,$this->password);
if(!$conn){
die("connect error".mysql_errno());
}
mysql_select_db($this->dbname) or die(mysql_errno());
//mysql_query("set names utf8",$this->conn);
}
//dql
public function execute_dql($sql){
$res=mysql_query($sql) or die(mysql_error());
return $res;
}
//dql2 返回一格数组 可以直接关闭结果集
public function execute_dql2($sql){
$arr=array();
$i=0;
$res=mysql_query($sql) or die(mysql_error());
while($row=mysql_fetch_assoc($res)){
$arr[$i++]=$row;
}
mysql_free_result($res);
return $arr;
}
//分页查询
public function execute_dql_fenye($sql1,$sql2,$fenyePage){
$res=mysql_query($sql1) or die(mysql_error());
$arr=array();
while($row=mysql_fetch_assoc($res)){
$arr[]=$row;
}
mysql_free_result($res);
$fenyePage->res_array=$arr;
$res2=mysql_query($sql2) or die(mysql_error());
if($row=mysql_fetch_row($res2)){
$fenyePage->rowCount=$row[0];
$fenyePage->pageCount=ceil($row[0]/$fenyePage->pageSize);
}
mysql_free_result($res2);
$daohangtiao="";
if($fenyePage->pageNow>1){
$prePage=$fenyePage->pageNow-1;
$fenyePage->daohangtiao= "<a href='{$fenyePage->gotoUrl}?pageNow=$prePage'>上一页</a>";
}
if($fenyePage->pageNow<$fenyePage->pageCount){
$nextPage=$fenyePage->pageNow+1;
$fenyePage->daohangtiao.= "<a href='{$fenyePage->gotoUrl}?pageNow=$nextPage'>下一页</a>";
}
//用for打印10页超链接
$start=floor(($fenyePage->pageNow-1)/10)*10+1;
$index=$start;
if($fenyePage->pageNow>10){
$fenyePage->daohangtiao.= " <a href='{$fenyePage->gotoUrl}?pageNow=".($start-1)."'><<</a>";
}
for(;$start<$index+10;$start++){
$fenyePage->daohangtiao.= "<a href='{$fenyePage->gotoUrl}?pageNow=$start'>[$start]</a>";
}
$fenyePage->daohangtiao.= " <a href='{$fenyePage->gotoUrl}?pageNow=$start'>>></a>";
$fenyePage->daohangtiao.= " 当前{$fenyePage->pageNow}页/共{$fenyePage->pageCount}页";
}
//dml
public function execute_dml($sql){
$res=mysql_query($sql) or die(mysql_error());
if(!$res){
return 0;//没有用户匹配
}
if(mysql_affected_rows($this->conn)>0){
return 1;//ok
}else{
return 2;//没有行受到影响
}
}
//关闭连接
public function close_connent(){
if(!empty($this->conn)){
mysql_close($this->conn);
}
}
}
?>
验证是合法用户跳转到Main.php，非法跳转到login.php并把errNo带回去并用红色输出。如图：
<html>
<head>
<meta http-equiv="content-type" content="text/html;charset=utf-8">
</head>
<?php
require_once 'common.php';
checkUserLegal();
$id=$_REQUEST['id'];
echo "欢迎".$id."登陆";
// setcookie("last_visit_time","",time()-100);
getLastTime();
?>
<h1>Main View</h1>
<a href="empList.php">管理用户</a><br/>
<a href="addEmp.php">添加用户</a><br/>
<a href="selectEmp.php">查询用户</a><br/>
</html>
在Main页面你可以选择管理用户，添加用户，查询用户（用户可以理解为雇员）。那么点击查询用户后会跳转到selectEmp.php去。
<html> <head> <meta http-equiv="content-type" content="text/html;charset=utf-8"> </head> <h1>查找用户</h1> <form action="empProcess.php" method="post"> 输入id号:<input type="text" name="id"/> <input type="hidden" name="flag" value="selectEmp"/> <input type="submit" value="go"/> </form> </html>
在selectEmp.php中的表单会跳转到empProcess.php去。
<?php
require_once 'empService.class.php';
require_once 'emp.class.php';
$empService=new empService();
if(!empty($_REQUEST['flag'])){
if($_REQUEST['flag']=="del"){
$id=$_REQUEST['id'];
if($empService->deleteById($id)==1){
header("Location: ok.php");
exit();
}else{
header("Location: err.php");
exit();
}
}else if($_REQUEST['flag']=="addEmp"){
$name=$_REQUEST['name'];
$grade=$_REQUEST['grade'];
$email=$_REQUEST['email'];
$salary=$_REQUEST['salary'];
if($empService->addEmp($name, $grade, $email, $salary)==1){
header("Location: ok.php");
exit();
}else{
header("Location: err.php");
exit();
}
}else if($_REQUEST['flag']=="selectEmp"){
$id=$_REQUEST['id'];
if($res=$empService->selectEmp($id)){
echo "id{$res[0]['id']} name{$res[0]['name']} grade{$res[0]['grade']} email{$res[0]['email']} salary{$res[0]['salary']}";
}
}else if($_REQUEST['flag']=="updataEmp"){
$id=$_REQUEST['id'];
$name=$_REQUEST['name'];
$grade=$_REQUEST['grade'];
$email=$_REQUEST['email'];
$salary=$_REQUEST['salary'];
if($empService->updataEmp($id, $name, $grade, $email, $salary)==1){
header("Location: ok.php");
exit();
}else{
header("Location: err.php");
exit();
}
}
}
?>
这其中require_once的empService.class.php和emp.class.php。
<?php
require_once 'SqlHelper.class.php';
class empService{
//计算出$PageCount
public function getPageCount($pageSize){
$sqlHelper=new SqlHelper();
$sql="select count(id) from emp";
$res=$sqlHelper->execute_dql($sql);
if($row=mysql_fetch_row($res)){
$rowCount=$row[0];
}
$pageCount=ceil($rowCount/$pageSize);
mysql_free_result($res);
$sqlHelper->close_connent();
return $pageCount;
}
//取出结果集
public function getRes($pageNow,$pageSize){
$sqlHelper=new SqlHelper();
$sql="select id,name,grade,email,salary from emp limit ".($pageNow-1)*$pageSize.",$pageSize";
$res=$sqlHelper->execute_dql2($sql);
$sqlHelper->close_connent();
return $res;
}
//分页
public function getFenyePage($fenyePage){
$sqlHelper=new SqlHelper();
$sql1="select id,name,grade,email,salary from emp limit ".($fenyePage->pageNow-1)*$fenyePage->pageSize.",$fenyePage->pageSize";
$sql2="select count(id) from emp";
$sqlHelper->execute_dql_fenye($sql1, $sql2, $fenyePage);
$sqlHelper->close_connent();
}
//删除用户
public function deleteById($id){
$sqlHelper=new SqlHelper();
$sql="delete from emp where id=$id";
return $sqlHelper->execute_dml($sql) or die(mysql_error());
$sqlHelper->close_connent();
}
//添加用户
public function addEmp($name,$grade,$email,$salary){
$sqlHelper=new SqlHelper();
$sql="insert into emp(name,grade,email,salary) values ('$name','$grade','$email','$salary')";
return $sqlHelper->execute_dml($sql) or die(mysql_error());
$sqlHelper->close_connent();
}
//查询用户
public function selectEmp($id){
$sqlHelper=new SqlHelper();
$sql="select * from emp where id=$id";
$res=$sqlHelper->execute_dql2($sql) or die(mysql_error());
$sqlHelper->close_connent();
return $res;
}
//修改用户
public function updataEmp($id,$name,$grade,$email,$salary){
$sqlHelper=new SqlHelper();
$sql="update emp set name='$name',grade=$grade,email='$email',salary=$salary where id=$id";
return $sqlHelper->execute_dml($sql) or die(mysql_error());
$sqlHelper->close_connent();
}
}
?>
<?php
class emp{
public $res_arr_emp;
}
?>
验证后若该用户存在输出该用户的详细信息，如id name grade email salary。这是查询，因为做的比较简单，所以没有写个超链接让它返回上一层。
若你在Main界面点击的是添加用户，则会跳转到addEmp.php。
<html> <head> <meta http-equiv="content-type" content="text/html;charset=utf-8"> </head> <h1>添加用户</h1> <form action="empProcess.php" method="post"> <table> <tr><td>name<td><td><input type="text" name="name"/><td></tr> <tr><td>grade(tinyint)<td><td><input type="text" name="grade"/><td></tr> <tr><td>email<td><td><input type="text" name="email"/><td></tr> <tr><td>salary(int)<td><td><input type="text" name="salary"/><td></tr> <tr><td><input type="submit" value="go"><td><td><input type="reset" value="reset"/><td></tr> <tr><input type="hidden" name="flag" value="addEmp"></tr> </table> </form> </html>
为了简单没有用js正则表达式去对表单中所输入的内容进行验证是否符合格式。输入完表单后会跳转到empProcess.php去验证。如果添加成功会跳转到ok.php，否则会跳转到err.php。
<?php
header("Content-Type:text/html;charset=utf-8");
echo "操作成功";
echo "<a href=empList.php>返回上一级<a>";
?>
<?php
header("Content-Type:text/html;charset=utf-8");
echo "操作失败<br/>";
echo "<a href=empList.php>返回上一级<a>";
?>
若在Main页面点击管理用户则会跳转到empList.php。
<html>
<head>
<meta http-equiv="content-type" content="text/html;charset=utf-8">
</head>
<?php
require_once 'empService.class.php';
require_once 'FenyePage.class.php';
require_once 'common.php';
checkUserLegal();
$fenyePage=new FenyePage();
//分页
$fenyePage->pageNow=1;//显示第几页 用户输入 不停变化
if(!empty($_GET['pageNow'])){
$fenyePage->pageNow=$_GET['pageNow'];
}
$fenyePage->pageCount=0;//共几页 需要$rowCount计算
$fenyePage->pageSize=5;//一页显示多少条记录
$fenyePage->rowCount=0;//数据库中获取 共有几条记录
$fenyePage->gotoUrl="empList.php";//要跳转的页面
$empService=new empService();
$empService->getFenyePage($fenyePage);
echo "<table border='1px' >";
echo "<tr><th>id</th><th>name</th><th>grade</th><th>email</th><th>salary</th><th><a href='#'>删除用户</a></th><th><a href='#'>修改用户</a></th></tr>";
for($i=0;$i<count($fenyePage->res_array);$i++){
$row=$fenyePage->res_array[$i];
echo "<tr><td>{$row['id']}</td><td>{$row['name']}</td><td>{$row['grade']}</td><td>{$row['email']}</td><td>{$row['salary']}</td><td><a href='empProcess.php?flag=del&id={$row['id']}'>删除用户</a></td><td><a href='updataEmp.php?flag=updataEmp&id={$row['id']}&name={$row['name']}&grade={$row['grade']}&email={$row['email']}&salary={$row['salary']}'>修改用户</a></td></tr>";
}
echo "<table>";
//打印导航条
echo $fenyePage->daohangtiao;
?>
</html>
其中require_once的FenyePage.class.php。
<?php
class FenyePage{
public $pageNow=1;//默认打开时第一页
public $pageSize;
public $pageCount;
public $rowCount;
public $res_array;
public $daohangtiao;//导航条
public $gotoUrl;//要跳转的页面
}
?>
点击修改用户会跳转到updataEmp.php。
<html>
<head>
<meta http-equiv="content-type" content="text/html;charset=utf-8">
</head>
<h1>修改用户</h1>
<?php
if($_REQUEST['flag']=="updataEmp"){
$id=$_REQUEST['id'];
$name=$_REQUEST['name'];
$grade=$_REQUEST['grade'];
$email=$_REQUEST['email'];
$salary=$_REQUEST['salary'];
}
?>
<form action="empProcess.php" method="post">
<table>
<tr><td>id<td><td><input readonly="readonly" type="text" name="id" value="<?php echo $id;?>"/><td></tr>
<tr><td>name<td><td><input type="text" name="name" value="<?php echo $name;?>"/><td></tr>
<tr><td>grade(tinyint)<td><td><input type="text" name="grade" value="<?php echo $grade;?>"/><td></tr>
<tr><td>email<td><td><input type="text" name="email" value="<?php echo $email;?>"/><td></tr>
<tr><td>salary(int)<td><td><input type="text" name="salary" value="<?php echo $salary;?>"/><td></tr>
<tr><td><input type="submit" value="go"><td><td><input type="reset" value="reset"/><td></tr>
<tr><input type="hidden" name="flag" value="updataEmp"></tr>
</table>
</form>
</html>
