php登录页面实现（php简单的登录页面代码）

使用PHP实现登录与注册功能以及使用PHP读取mysql资料库——以表格形式展现资料

登录窗口

后台登录处理

<?php

$uid = $_POST[“uid”];

$pwd = $_POST[“pwd”];

$db = new MySQLi(“localhost”,”root”,””,”0710_info”);

if(mysqli_connect_error()){

die(“连接失败”);

}

$sql = “select pwd from users where uid='{$uid}'”;

//echo $sql;

$result = $db->query($sql);

$arr = $result->fetch_row();

//以免sql注入进攻

if($arr[0]==$pwd && !empty($pwd)){

//跳转到主窗口(php方法)

header(“location:register_system.php”);

//JS跳转页面方法

/*echo “

window.location.href=’register_system.php’

”;*/

}else{

header(“location:login_system.php”);

}

?>

注册窗口

JS表单验证

function check(){

var uid = document.getElementsByTagName(“input”)[0].value;

if(uid == “”){

alert(“请输入客户名!”);

return false;

}

var pwd = document.getElementsByTagName(“input”)[1].value;

if(pwd == “”){

alert(“请输入密码!”);

return false;

}

var name = document.getElementsByTagName(“input”)[2].value;

if(name == “”){

alert(“请输入姓名!”);

return false;

}

}

后台注册处理

<?php

$uid = $_POST[“uid”];

$pwd = $_POST[“pwd”];

$name = $_POST[“name”];

$sex = $_POST[“sex”];

$db = new MySQLi(“localhost”,”root”,””,”0710_info”);

if(mysqli_connect_error()){

die(“连接失败”);

}

$sql = “insert into users values(‘{$uid}’,'{$pwd}’,'{$name}’,{$sex})”;

$r = $db->query($sql);

if($r){

echo “注册成功!”;

}else{

echo “注册失败！”;

}

?>

PHP读取mysql资料库——以表格形式展现资料

<?php

$db = new MySQLi(“localhost”,”root”,””,”0710_info”);

$sql = “select info.code,info.name,sex,birthday,nation.name from info join nation on info.nation=nation.code”;//联动查询

$result = $db->query($sql);

$arr = $result->fetch_all();

//var_dump($arr);

//使用foreach循环遍历全部资料

foreach($arr as $v){

$sex = $v[2]?’男’:’女’;//使用三元运算符判断性别

echo “

”;

}

?>