Not Using Prepared Statements
- Mistake: Embedding user input directly into SQL queries invites SQL injection attacks.
// Mistaken code
$query = "SELECT * FROM users WHERE username = '" . $_POST['username'] . "'";
- Correction: Utilize prepared statements to separate SQL code from user input, using placeholders and bind parameters for safer execution.
Syntax:
$stmt = $pdo->prepare("SELECT * FROM users WHERE username=?");
$stmt->execute([$username]);
Common Mistakes to Avoid in PHP
PHP is a widely used server-side scripting language for web development. However, developers often overlook best practices, leading to vulnerabilities and inefficiencies. This article delves into common PHP mistakes and offers comprehensive solutions.
Table of Content
- Not Using Prepared Statements
- Ignoring Error Handling
- Poor Password Security
- Lack of Input Validation
- Mixing PHP and HTML