Check out example codes for "sql injection attack". It will help you in understanding the concepts better.

Code Example 1

1 or 1=1 sfyan

Code Example 2

$value = "your value here";

try {
            $pdo = new PDO($dsn, $username, $password, $>drivers);
        } catch (\PDOException $e) {
            echo 'Connection Failed: ' . $e->getMessage();
        }
        
$sql = "INSERT INTO `my_db` SET `field` = ? ";
$stmt = $this->pdo->prepare($sql);
        $stmt->bindValue(1, $value, PDO::PARAM_STR);
        $stmt->execute();
        $stmt = null;

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