Really, I have tried many methods and watched many videos. It is obviously the same code. Why are mine unsuccessful? I don’t know why others are... It’s very annoying. The unsuccessful prompt box does not show an error. Wherever I click, I feel like it’s going to crash 0_0
login.php：
<!DOCTYPE>
<html>
<head>
<meta charset="utf-8">
<title>Login</title>
<script>
function init(){
if(myform.username.value==""){
alert("Please enter the username");
//Move the cursor Move to the text box
myform.username.focus();
return false;
}
if(myform.userpwd.value== ""){
alert("Please enter your password");
myform.userpwd.focus();
## if(myform.code.value==""){ alert("Please enter the verification code"); myform.code.focus(); .code{ width: 80px; .title{ font-size: 20px;font-weight: bold; position: relative; left: 50px; } .bd{ background-color:#f0f0f0; width: 230px; } </style></head>
<body><form action="logincheck.php" method="post" name="myform"><div> <div>User login</div> </div> <div> <span>Username: </span> ; <span><input type="text" name="username" id="username" placeholder="Please enter username"></span> </div>
" id="userpwd" placeholder="Please enter your password"></span>
</div>
<div>
" <span> ;Verification code: </span>
<span><input type="text" name="code" id="code" class
="code" placeholder= "Please enter the verification code"></span>
<!-- <span><img src="img.php" onclick="this.src='pic.php? nocache=' Math.random()" style="cursor:pointer"></span> -->
<span><img src="img.php">< ;/span>
</div>
<div>
<span><button>Log in now</button></span> ;
<span><a href="register.php">Register</a></span>
</div>
<span><input type="hidden" value="hidden"></span>
</form>
< /body>
</html>
regcheck.php
<?php
header("content-Type: text/html; charset=Utf-8");
session_start();
//Registration processing page regcheck.php
if (isset($_POST["hidden"]) &&$_POST["hidden"]=="hidden") {
$user=trim($_POST["username"]);//Use the trim function to remove whitespace characters on both sides of the string
$pwd=md5(trim($_POST["userpwd"]));
$pwd_confirm=md5(trim($_POST["confirm"]));
$code=$_POST["code"];
if($user==""||$pwd==""||$pwd_confirm==""){
// echo "<script>alert("Please confirm the integrity of the information"):history.go(-1);</script>";
}elseif ($code!=$_SESSION[ "var_code"]) {
// echo "<script>alert("Verification code is incorrect"):history.go(-1);</script>";
}else{
if ($pwd==$pwd_confirm) {
$conn=mysql_connect("localhost","root","a123456");//Account to connect to the database Password
if (mysqli_errno($conn)) {
echo mysqli_errno($conn);
exit;
}
mysqli_select_db($conn,"userdb");//Select database
mysqli_set_charset($conn,"utf8");//Set character set
// $sql="select username from USER where username='$user'";//sql statement
$sql = "SELECT * FROM `user` PROCEDURE ANALYSE()";
// mysql_query(query)
$result=mysqli_query($conn,$sql);//Execute SQL statements
$num = mysqli_num_rows($result); //Count the number of rows affected by the execution results
if($num) //If the user already exists
{
echo "<script>alert('Username already exists'); history .go(-1);</script>";
}
else //The current registered user name does not exist
{
$ ip=ip2long($_SERVER['REMOTE_ADDR']); // Convert ip address to integer
$time=time();
$sql_insert = "insert into `user` (`username`,`userpwd`,`createtime`,`createip`) values('" . $user . "','" . $psw ."','".$time."','".$ ip."')";
//$sql = "SELECT * FROM `user` PROCEDURE ANALYSE()";
$res_insert = mysqli_query($conn,$sql_insert);
if($res_insert)
{
echo "<script>alert('Registration successful! ');window.location.href='login.php';</script>";
}
else
{
echo "<script>alert('The system is busy, please wait!'); history.go(-1);</script>";
}
}
}
else
{
echo "<script>alert('Passwords are inconsistent! '); history.go(-1);</script>";
}
}
}
else
{
// echo "<script>alert('Submission failed!');</script>";
echo "<script>alert('weichenggong ');</script>";
}
?>
logincheck.php
<?php
header("content-Type: text/html; charset=Utf-8");
session_start();
//Login processing interface logincheck.php
//Determine whether the submit button is pressed
if(isset($_POST["hidden"]) && $_POST["hidden"] == "hidden")
{
//Save the username and password into variables for subsequent use
$user = trim($_POST["username"]);//The trim() function removes the characters on both sides of the string Blank characters
$psw = md5(trim($_POST["userpwd"]));//The password is encrypted once with md5() and stored in the database
$code = $_POST[ "code"];
if($user == "" || $psw == "")
{
//One of the username or password If it is empty, a dialog box will pop up. After confirmation, return to the previous page of the current page
echo "<script>alert('Please enter your username or password!'); history.go(-1); </script>";
}else if($code != $_SESSION[' ver_code']){
echo "<script>alert('The verification code is incorrect, Please re-enter!'); history.go(-1);</script>";
}
else
{ //Confirm username and password verification If the code is not empty, connect to the database
$conn = mysqli_connect("localhost","root","a123456");//The database account password is set when installing the database
if( mysqli_errno($conn)){
echo mysqli_errno($conn);
exit;
}
mysqli_select_db($conn,"userdb") ;
mysqli_set_charset($conn,'utf8');
$sql = "select username,userpwd from user where username = '$user' and userpwd = '$psw'";
//$sql = "SELECT * FROM `user` PROCEDURE ANALYSE()";
$result = mysqli_query($conn,$sql);
$num = mysqli_num_rows($result);
if($num)
{
echo "<script>alert('Successful login'); window.location.href= 'index.php';</script>";
}
else
{
echo "<script>alert('User The name or password is incorrect! ');history.go(-1);</script>";
}
}
}
else
{
echo "<script>alert('提交未成功！');</script>";
}
?>
register.php
<!DOCTYPE html>
<html>
<head>
<title>php.cn</title>
<meta charset="utf-8" />
<style>
.box{
width:250px;
height:120px;
background:#f0f0f0;
}
</style>
</head>
<body>
<!-- 注册界面 register.php-->
<div class="box" align="center">
<div>用户注册</div>
<form action="regcheck.php" method="post">
<table>
<tr>
<td align="right">用户名：</td>
<td><input type="text" name="username" maxLength="6"/></td>
</tr>
<tr>
<td align="right">密 码：</td>
<td><input type="password" name="userpwd" maxLength="6"/></td>
</tr>
<tr>
<td align="right">确认密码：</td>
<td><input type="password" name="confirm" maxLength="6"/></td>
</tr>
<tr>
<td colspa="2" align="right"><input type="Submit" name="Submit" value="注册"/></td>
</tr>
</table>
</form>
</div>
</body>
</html>
求大神解决，我觉得再解决不出来，我的头发都要掉光了
![[Web front-end] Node.js quick start](https://img.php.cn/upload/course/000/000/067/662b5d34ba7c0227.png)
The code is too long and I can’t read it. I can take a screenshot of the error message or remotely to help you check it
Please tell me the error message or execution result
It’s too long and I can’t read it