[PHP] How to prevent SQL injection with PHP

SQL injection is a type of attack that allows malicious users to execute arbitrary SQL commands on a database, potentially compromising its integrity and security. SQL injection can be prevented by using proper techniques to handle user input and construct SQL queries in PHP 5.

One of the most common and effective ways to prevent SQL injection is to use prepared statements and parameterized queries. These are SQL statements that are sent to and parsed by the database server separately from any parameters, such as user input. This way, the parameters are treated as data and not as part of the SQL command, making it impossible for an attacker to inject malicious SQL.

How to prevent SQL injection with PHP 5.+

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How to connect to database - source code below 👇

Delete Query - source code below 👇

Insert Query - source code below 👇

Select Query - source code below 👇

 
/**************************************************************
 * Developer:        Zidane (huuvi168@gmail.com)
 * Last Modified:   2015-10-22
 * ***********************************************************/

public function getListPC()
{
    try
    {
       $conn = $this->connect();
       $strsql = "SELECT * FROM PC";
    
       $list = array();
    
       if ($stmt = $conn->prepare($strsql))
       {
           $stmt->excute();
     
            while ($row = $result->fetch_assoc())
            {
                  $id = $row['id'];
                  $name = $row['name'];
                  $typeid = $row['typeid'];
                  $download = $row['download'];
                  $rate = $row['rate'];
                  $image = $row['image'];
                  $note = $row['note'];

                  $clsPC = new clsPC ($id, $name, $typeid, $download, 
                                            $rate, $image, $note) 
                  array_push ($list, $clsPC);
             }
        }
  
        $stmt->fetch();
        $stmt->close();
        return $list;   
    }
   
    catch(Exception $e)
    {
        echo $e->getMessage();
        return null;
    }
}

 

If you get a issue select query use php array object class. you can checkout below topic for slove your issue here. 

How to use array object class

Topic detail here:

https://learn-tech-tips.blogspot.com/2015/04/php-how-to-use-array-object-class.html

Update Query - source code below 👇

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