How can one effectively identify security vulnerabilities and bugs in a PHP website?

To effectively identify security vulnerabilities and bugs in a PHP website, one can conduct regular security audits, utilize automated tools like security scanners, perform manual code reviews, and implement input validation and output encoding techniques to prevent common vulnerabilities like SQL injection and cross-site scripting. 

// Code snippet for input validation to prevent SQL injection
$user_input = $_POST['user_input'];
$clean_input = mysqli_real_escape_string($connection, $user_input);
$query = "SELECT * FROM users WHERE username='$clean_input'";
$result = mysqli_query($connection, $query);

Keywords

Security vulnerabilities bugs PHP website penetration testing code review

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