Is `mysqli_real_escape_string` Enough to Prevent SQL Injection Attacks?

Is "mysqli_real_escape_string" Adequate for Preventing SQL Attacks?

The provided code utilizes mysqli_real_escape_string to safeguard against SQL injections. However, it's crucial to note that this function alone is insufficient for complete protection.

Vulnerability to SQL Injection

Despite employing mysqli_real_escape_string, the code remains susceptible to SQL injection attacks. This is because it uses string concatenation to assemble the SQL query, which allows attackers to manipulate the query by injecting malicious code through the form inputs.

Recommended Solution: Prepared Statements

The most effective method to prevent SQL injections is through prepared statements. They separate data parameters from query instructions, eliminating the possibility of contamination. Here's an example:

$stmt = $db_con->prepare("INSERT INTO `users` (`email`, `psw`) VALUES (?, ?)");
$stmt->bind_param("ss", $email, $psw);
$stmt->execute();

Additional Security Measures

In cases where prepared statements are not feasible, consider:

• Whitelist Validation: Restrict user input to a predefined set of allowed values.
• Type Casting: Ensure that values are properly converted to their intended types, preventing malicious code execution.
• Disable Emulated Prepared Statements: If using MySQL, set $db_con->setAttribute(PDO::ATTR_EMULATE_PREPARES, false); to enhance security.

By implementing these measures, you can significantly enhance the security of your application against SQL injections and other SQL attacks.

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