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How to use / write mysql_real_escape_string in PDO?

In my code, Im trying to translate mysql_real_escape_string into a PDO statement. Does anyone have a clue on how to write mysql_real_escape_string in PDO?

Im using mysql_real_escape_string in two lines: $ userName = mysql_real_escape_string ($ _ POST ['username']); $ password = sha1 (mysql_real_escape_string ($ _ POST ['password']));

<?php
ob_start();
session_start();
include("../database/db.php");

$userName = mysql_real_escape_string($_POST['username']);
$password = sha1(mysql_real_escape_string($_POST['password']));
echo "<br>user: " . $userName;
echo "<br> pw: " . $password;

$query = "select * from tbladmin where admin_usr_name='$userName' and admin_pwd='$password'";

$res = mysql_query($query);

// $rows = $res->fetch(PDO::FETCH_ASSOC); 
$rows = mysql_fetch_assoc($res);
echo "<br>numrows" . mysql_num_rows($res) . "<br>";

// $find = $query->prepare("select * from tbladmin where admin_usr_name='$userName' and admin_pwd='$password'");
// $find->execute();
// if ($find->fetchColumn() > 0)
// {
// echo 'You made it, welcome';
//  $_SESSION['userName']  =  $rows['admin_usr_name'];
//  $_SESSION['admin_id'] = $rows['admin_id'];
//  header("location: ../pages/content.php");
// }
// else
// {
//  echo 'Username and password dont match <br/> Try again';
//  header("location: ../index.php?loginerror=yes");
// } 

if(mysql_num_rows($res)>0)
{
    $_SESSION['userName']  =  $rows['admin_usr_name'];
    $_SESSION['admin_id'] = $rows['admin_id'];
    header("location: ../pages/content.php");
}
else
{
    echo 'Username and password dont match <br/> Try again';
    header("location: ../index.php?loginerror=yes");
}

? >

This is what I'm trying to do with PDO

  $host = "localhost"; 
$user = "root"; 
$password = "root";
$db = "blog";

$dsn = "mysql:host=$host;dbname=$db;charset=utf8";
$opt = array(PDO::ATTR_ERRMODE => PDO::ERRMODE_EXCEPTION,PDO::ATTR_DEFAULT_FETCH_MODE => PDO::FETCH_ASSOC);
$pdo = new PDO($dsn,$user,$password, $opt);

$username = $_POST['username'];
$password = $_POST['password'];
$query = "select * from tbladmin where admin_usr_name=:userName and admin_pwd=:passWord";

try 
{   
$databas = new PDO($dsn, $user, $password);
} 
catch (PDOException $e) 
{
echo 'Connection failed: ' . $e->getMessage();
}

$statement = $databas->prepare($query);

$statement->execute(array(':userName'=>$username, ':passWord'=> $password)); 
$row = $statement->fetch();

I always get this error: Call prepare () member function for non-object

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3 answers

The fact is that with the help of prepared statements with parameterized queries and related values, you do not need such things as mysql_real_escape_string.

PDO , / .

, SQL- :

$query = $pdo->prepare("SELECT * FROM users WHERE username = ? and password = ?");

"? , :

$query->bindParam(1, $username);
$query->bindParam(2, $password);

SQL-, 1'; DROP users -- , , .

+7

PDO. , .

+3

, escaping... , ? sql-

- :

<?php
$username = $_POST['username'];
$password = $_POST['password'];
$query = "select * from tbladmin where admin_usr_name=:userName and admin_pwd=:passWord";

try {   
  $db = new PDO($dsn, $un, $pw);
} catch (PDOException $e) {
  echo 'Connection failed: ' . $e->getMessage();
}

$statement = $db->prepare($query);

//:userName and :passWord is set when actually executing the query
$statement->execute(array(':userName'=>$username, ':passWord'=> $password)); 
$row = $statement->fetch();
?>

, fetch() ( ). , :

  • while() { }
  • $rows = $statement->fetchAll(); $rows

1 .

2 ( , )

, PDO:: ATTR_EMULATE_PREPARES. : PDO MySQL: PDO:: ATTR_EMULATE_PREPARES ?

+1

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