How can one handle the issue of displaying a white page when passing a non-existent id value in the URL in PHP?

When passing a non-existent id value in the URL, you can handle the issue by checking if the id exists in your database before displaying the page. If the id does not exist, you can redirect the user to an error page or display a custom message instead of showing a blank white page. 

<?php
// Check if the id exists in the database
$id = $_GET['id'];
// Perform a query to check if the id exists in the database
// If the id does not exist, redirect to an error page or display a custom message
if(!$id_exists) {
    header("Location: error_page.php");
    exit();
} else {
    // Display the content for the valid id
}
?>

Keywords

PHP URL error handling isset empty

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