how use select command in php

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SQL

Hi

I am new in php. Below code works fine. But If I change Select Command Like this:

$sql = "SELECT login_id,password FROM user_right WHERE login_id = &$username& and password = $password'

It shows error recorde not found. Also I need to show the role of select user. Pls Help me

PHP

<?php
include_once'../inc/header.php';
if (isset($_POST['submit']) && $_POST['submit']  != "" )
{ 
       if(empty($_POST['username']))
            {
                $handleError = "User is empty!";
                $_SESSION["errormsg"] = $handleError;
                header("Location:../notification/errormsg.php"); 
                //echo $handleError;
                return false;
            }
    if(empty($_POST['password']))
            {
                $handleError = "Password is empty!";
                $_SESSION["errormsg"] = $handleError;  
                header("Location:../notification/errormsg.php"); 
                //echo $handleError;
                return false;
            }
        $username = trim($_POST['username']);
        $password = trim($_POST['password']);
        try 
            {
                $sql  = "SELECT * FROM user_right WHERE login_id = '$username' and password = '$password'";  
                $stmt = $dbh->prepare($sql); 
                $stmt->setFetchMode(PDO::FETCH_ASSOC);  
                if ($stmt = $dbh->query($sql)) {
                    if ($stmt->fetchColumn() > 0) 
                        {
                            $_SESSION["username"] = $username;
                            $_SESSION["password"] = $password;
                            header("Location:../admin/"); 
                            exit();
                        }
                    else 
                        {
                            $handleError="user name or password is wrong";
                            $_SESSION["errormsg"] = $handleError;  
                            header("Location:../notification/errormsg.php"); 
                            exit(); 
                        };
                }                
            }
         catch (PDOException $e) 
            {
              echo $e->getMessage() . "\n";
              file_put_contents('PDOErrors.txt', $e->getMessage(), FILE_APPEND);
            }
}
include '../inc/footer.php';

Posted 22-Mar-14 1:25am

Maideen Abdul Kader

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Comments

Peter Leow 22-Mar-14 8:55am

Why do you want to do that, if the original code is fine?

Maideen Abdul Kader 22-Mar-14 20:52pm

coz, i need some other column like role and access no to be in session.
I do not know how to do this. Let say I need to know the role of the user and email id how to do?

Maideen Abdul Kader 22-Mar-14 21:20pm

and also i need to know if i change the code like
Select login_id,password,role from user_right where login_id='$username' and password='$password'
why the error prompt "login id and password wrong. If i run original code with same username and password, it fine
and also i need $role= how should i get value of role. pls

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**Nirav Prabtani** · Accepted Answer · 2014-03-22T03:14:00

see this.. :)

PHP

$con=mysqli_connect("example.com","peter","abc123","my_db");
// Check connection
if (mysqli_connect_errno())
  {
  echo "Failed to connect to MySQL: " . mysqli_connect_error();
  }

$result = mysqli_query($con,"SELECT * FROM Persons");

while($row = mysqli_fetch_array($result))
  {
  echo $row['FirstName'] . " " . $row['LastName'];
  echo "<br>";
  }

mysqli_close($con);
?>
</br>

Reference.. :)

Php Select Query.. :)[^]