What are some common pitfalls to avoid when implementing PHP contact forms on a website?

One common pitfall to avoid when implementing PHP contact forms is not properly sanitizing user input to prevent malicious code injection. To solve this issue, always use PHP's `htmlspecialchars()` function to escape user input before displaying it on the webpage. 

// Sanitize user input before displaying it on the webpage
$name = htmlspecialchars($_POST['name']);
$email = htmlspecialchars($_POST['email']);
$message = htmlspecialchars($_POST['message']);

Keywords

SQL injection form validation CSRF protection email headers error handling

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