What are some potential issues with the code provided for checking website addresses in PHP forms?

The code provided for checking website addresses in PHP forms does not account for all valid website address formats, such as those with subdomains or paths. To solve this issue, we can use PHP's filter_var function with the FILTER_VALIDATE_URL filter to properly validate website addresses. 

// Validate website address using filter_var
$website = $_POST['website'];

if (!filter_var($website, FILTER_VALIDATE_URL)) {
    echo "Invalid website address";
} else {
    echo "Valid website address";
}

Keywords

validation regular expressions form submission error handling sanitization

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