无法使用php重定向到登录页面
[英]unable to redirect to login page using php
问题描述
注册页面
<html>
<head>
<meta name="keywords" content="example, Javascript Form Validation, Sample registration form" />
</head>
<body>
<form name="registration" method="post" action= '<?php $_SERVER["PHP_SELF"] ?>'>
<label for="user">USERNAME</label>
<input name="user" type="text" id="username" placeholder="should not contain spaces" required><br><br>
<label for="email">EMAIL</label>
<input name="email" type="email" id="email" placeholder="eg: abc@xyz.com" required><br><br>
<label for="pass">PASSWORD</label>
<input name="pass" type="password" id="password" placeholder="atleat 8 characters" required><br><br>
<label for="conf_pass">CONFIRM PASSWORD</label>
<input name="conf_pass" type="password" id="conf_pass" placeholder="atleat 8 characters" required><br><br>
<label for="mobile">MOBILE NO</label>
<input name="mobile" type="number" id="mobile" placeholder="should contain 10 digits" required><br><br>
<label for="dob">DATE OF BIRTH</label>
<input name="dob" type="date" id="dob" required><br><br>
<input type="submit" name="signup" id="submit" value="Submit">
</form>
</body>
</html>
===============================================================================
<?php
$conn=new mysqli("localhost","khushank","sethi","emp");
if(!$conn){
echo "unable to connect".$conn->connect_error();
}
if($_SERVER['REQUEST_METHOD']=='POST') {
if(isset($_POST['signup'])){
$user=$_POST['user'];
$email=$_POST['email'];
$psw=$_POST['pass'];
$conf_psw=$_POST['conf_pass'];
$mob=(int)$_POST['mobile'];
$dob=$_POST['dob'];
if($psw!=$conf_psw){
echo"<script type='text/javascript'>".'alert(confirm password and password should be same");
</script>';
}
else{
$sel="SELECT userid FROM details WHERE userid='$user'";
$sql="INSERT INTO details(userid,email,pass,mobile,date_of_birth) VALUES(?,?,?,?,?)";
$res=$conn->query($sel);
if($res->num_rows!=0){
echo"<script type='text/javascript'>".'alert("username already exists");
</script>';
}
else{
$stmt=$conn->prepare($sql);
$stmt->bind_param('sssis', $user, $email, $pass, $mob, $dob);
if($stmt->execute()){
header('location:login.php');
}
$stmt->close();
}
}
}
}
$conn->close();
?>
2 个解决方案
解决方案1
0 2018-06-03 07:20:08
更改
action= '<?php $_SERVER["PHP_SELF"] ?>
至
action= '<?php echo $_SERVER["PHP_SELF"] ?>
并将php循环和db连接移到表单顶部
解决方案2
0 2018-06-03 07:30:42
如果以上是您页面的实际代码，则存在问题。 要使用header您需要在将任何HTML内容发送到浏览器之前执行此操作（尽管您可以使用output buffering来缓解此要求，但不是最佳实践）-因此很可能会记录错误，但显然不会显示错误，否则您会在问题中提到他们了吗？
同样，下面的线也会导致错误。
echo"<script type='text/javascript'>".'alert(confirm password and password should be same");
</script>';
进行一些小改动-将php代码放在HTML之前应该可以解决与header使用有关的错误，简化javascript变量和后续显示。 删除PHP_SELF作为表单操作-它很容易被滥用，并且当您发布到同一页面时，根本不需要。
<?php
try{
$message=false;
if( $_SERVER['REQUEST_METHOD']=='POST' ) {
$conn=new mysqli( "localhost", "khushank", "sethi", "emp" );
if( !$conn ) throw new Exception( sprintf( "Unable to connect: %s", $conn->connect_error() ), 1 );
/*
ensure that other required fields are in the submitted data
*/
if( isset(
$_POST['signup'],
$_POST['user'],
$_POST['email'],
$_POST['pass'],
$_POST['conf_pass'],
$_POST['mobile'],
$_POST['dob']
)){
$user=$_POST['user'];
$email=$_POST['email'];
$psw=$_POST['pass'];
$conf_psw=$_POST['conf_pass'];
$mob=(int)$_POST['mobile'];
$dob=$_POST['dob'];
/* passwords do not match - abort processing here */
if( $psw !== $conf_psw ){
$message='confirm password and password should be same';
} else{
/* try to locate user in db */
$sql="select `userid` from `details` where `userid`=?";
$stmt=$conn->prepare( $sql );
if( !$stmt ) throw new Exception( 'Failed to prepare sql query', 3 );
$stmt->bind_param('s', $user );
$res=$stmt->execute();
if( $stmt->num_rows == 0 ){
/* user does not already exist */
$sql="insert into `details` ( `userid`, `email`, `pass`, `mobile`, `date_of_birth` ) values( ?,?,?,?,? )";
/* clean up from previous query */
$stmt->free_result();
$stmt->close();
/* prepare new query */
$stmt=$conn->prepare( $sql );
if( !$stmt ) throw new Exception( 'Failed to prepare sql query', 4 );
/* bind and execute */
$stmt->bind_param( 'sssis', $user, $email, $pass, $mob, $dob );
$result = $stmt->execute();
/* this should be exactly 1 */
$count = $conn->affected_rows;
$stmt->close();
$conn->close();
if( $count===1 )header( 'Location: login.php' );
} else {
$message='username already exists';
}
}
$conn->close();
} else {
throw new Exception( 'Missing or empty values in POST data', 2 );
}
}
}catch( Exception $e ){
exit( sprintf( 'Exception: %s, Code: %d', $e->getMessage(), $e->getCode() ) );
}
?>
<html>
<head>
<meta name='keywords' content='example, Javascript Form Validation, Sample registration form' />
<title>User registration</title>
</head>
<body>
<form name='registration' method='post'>
<label for='user'>USERNAME</label>
<input name='user' type='text' id='username' placeholder='should not contain spaces' required>
<br><br>
<label for='email'>EMAIL</label>
<input name='email' type='email' id='email' placeholder='eg: abc@xyz.com' required>
<br><br>
<label for='pass'>PASSWORD</label>
<input name='pass' type='password' id='password' placeholder='atleat 8 characters' required>
<br><br>
<label for='conf_pass'>CONFIRM PASSWORD</label>
<input name='conf_pass' type='password' id='conf_pass' placeholder='atleat 8 characters' required>
<br><br>
<label for='mobile'>MOBILE NO</label>
<input name='mobile' type='number' id='mobile' placeholder='should contain 10 digits' required>
<br><br>
<label for='dob'>DATE OF BIRTH</label>
<input name='dob' type='date' id='dob' required>
<br><br>
<input type='submit' name='signup' id='submit' value='Submit'>
</form>
<?php
/* If there was an error, use a javascript alert to inform user */
if( $_SERVER['REQUEST_METHOD']=='POST' && !empty( $message ) ){
printf( '<script>alert("%s");</script>', $message );
}
?>
</body>
</html>
希望能帮助到你...
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