title: MySQL enter information into table from user input
body: <p><br/><br/>
  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: <strong>Is there a way to add rows into the table when a user inputs information into a form?</strong> Below is the php page described above. Is there a way to modify this script to allow a user to input rows? </p>
  
  <pre><code>&lt;?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();
  ?&gt;
  </code></pre>
  
  <p>Thank you so much for your help</p>