Question

On my website I have a PHP script which (when user enters a “username” and “password” into a form) checks a MySQL table for the existence of the username and password, and passes the user onto the main page of the website. Here is my question: Is there a way to add rows into the table when a user inputs information into a form? Below is the php page described above. Is there a way to modify this script to allow a user to input rows?

<?php
ob_start();
$host="--------"; // Host name 
$username="-------"; // Mysql username 
$password="--------"; // Mysql password 
$db_name="--------"; // Database name 
$tbl_name="-------"; // Table name 

// Connect to server and select databse.
mysql_connect("$host", "$username", "$password")or die("cannot connect"); 
mysql_select_db("$db_name")or die("cannot select DB");

// Define $myusername and $mypassword 
$myusername=$_POST['myusername']; 
$mypassword=$_POST['mypassword']; 

// To protect MySQL injection (more detail about MySQL injection)
$myusername = stripslashes($myusername);
$mypassword = stripslashes($mypassword);
$myusername = mysql_real_escape_string($myusername);
$mypassword = mysql_real_escape_string($mypassword);

$sql="SELECT * FROM $tbl_name WHERE username='$myusername' and password='$mypassword'";
$result=mysql_query($sql);

// Mysql_num_row is counting table row
$count=mysql_num_rows($result);
// If result matched $myusername and $mypassword, table row must be 1 row

if($count==1){
// Register $myusername, $mypassword and redirect to file "login_success.php"
session_register("myusername");
session_register("mypassword"); 
header("location:login_success.php");
}
else {
echo "Wrong Username or Password";
}

ob_end_flush();
?>

Thank you so much for your help

Answer 1

You’re looking for a MySQL Insert statement.

$sql = "INSERT INTO $tbl_name (username, password) values ('$myusername', '$mypassword')";
$result=mysql_query($sql);