How can PHP developers ensure that the correct HTTP status codes are returned when dealing with non-existent pages?

PHP developers can ensure that the correct HTTP status codes are returned when dealing with non-existent pages by using the header function to set the appropriate status code, such as 404 Not Found. They can also include a custom error message or redirect the user to a designated error page. 

<?php
// Check if page exists
if (!page_exists($page)) {
    header("HTTP/1.0 404 Not Found");
    echo "404 - Page not found";
    // Or redirect to custom error page
    // header("Location: error.php");
    exit();
}

// Function to check if page exists
function page_exists($page) {
    // Logic to check if page exists
    return false;
}
?>

Keywords

HTTP status codes PHP developers non-existent pages error handling response codes

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