php redirect to a different page trouble
Question
I am having difficulty with header redirecting me to index.html from my login page. I'm not sure header is even the way to go but it is all that I could find on page redirection.
This code is just a simple login page which checks the username and password against a MySQL database.
The problem I am having is inside the if statement:
if(mysqli_num_rows($res) == 1){
header("Location: index.php");
exit();
}
full code for login.php:
<?php
//Connects to MySQL database using sql_connect.php
require "sql_connect.php";
?>
<?php
if(isset($_POST['username'])) {
$username = $_POST['username'];
$password = $_POST['password'];
$sql = "SELECT * FROM login_test WHERE username='".$username."' AND password='".$password."' LIMIT 1";
$res = mysqli_query($connection, $sql);
if(mysqli_num_rows($res) == 1){
header("Location: index.php");
exit();
} else {
echo "Invalid login information!";
exit();
}
}
?>
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>login</title>
<link rel="stylesheet" href="../style.css">
</head>
<body>
<form name="login" method="post" action="login.php">
<h3>Login</h3>
<p>Username: </p><input type="text"name="username">
<p>Password: </p><input type="password" name="password">
<br/>
<input type="submit"name="submit"value="log in">
</form>
<script src="../script.js" type="text/javascript"></script>
</body>
</html>
While I'm sure the rest of my code is far from perfect I am just really looking at how to redirect to a new page if the user is authenticated in the database? Is there a better option than header in my case or am I just implementing it wrong?
2 answers
solution1
1 2016-03-31 02:23:25
I used php header before, but have bad experience.
Normally I use javascript
echo '<script type="text/javascript">' . "\n";
if(isset($from))
{
echo 'window.location="..";';
}
else
{
echo 'window.location="..";';
}
echo '</script>';
solution2
0 2016-03-31 05:45:56
header() function didn't work well may cause by your "mysqli_num_rows($res) == 1" result is false.
And There is no space between "Location" and your "index.php" like: header("Location:index.php");
Or you can create a php function and use JavaScript, its a good way to avoid that.
function redirect($url, $prompt) {
$js_string = "<script>";
$js_string .= $prompt ? "alert('". $prompt ."');" : "";
$js_string .= "window.location = '{$url}';";
$js_string .= "</script>";
exit($js_string);
}
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