How can one ensure their PHP code is original and relevant when seeking help?

Issue: I am trying to validate a user's input in a form using PHP to ensure it is a valid email address. PHP Code Snippet: 

$email = $_POST['email'];

if(filter_var($email, FILTER_VALIDATE_EMAIL)) {
   echo "Email is valid";
} else {
   echo "Email is not valid";
}

Keywords

plagiarism code duplication code review code quality code documentation

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