正确的错误类型软404

Question

I try to correct error "soft404"

I read this https://support.google.com/webmasters/answer/181708?hl=fr so it's ok i understand.

To correct this error with a personalized page 404 can I do :

<?php



    try{
         echo "Error, I fail to load the services I catch It ! (have imagination)";
    }
    catch(Exception $e){
        header("HTTP/1.0 404 Not Found");
        include 'page404.html';
        exit;
    }


?>

Answer 1

You don't quite understand the meaning of 404 error and confuse it with a 500 one.
A PDO error has nothing to do with page existence. It is a code error means site experiencing temporary problems. Thus, 500 has to be sent.

It is said that modern PHP versions have to take care of it, but I have some reports that it doesn't. The only guaranteed way known to me is to use php-fpm, as sending 503 in case of error is one its core features.

Anyway, at least try to set display_errors = off in PHP settings (ini or perdir).
Then change your code to.

<?php
echo "Je me connecte a un module foireux et la page est introuvable.";
$pdo = new PDO("n'importe quoi !");

and properly configured PHP will respond with 500 automatically!

Yet if there is no page found - you indeed have to respond with 404.

<?php
$data = DB::getData("SELECT * FROM articles WHERE id=?", $_GET['id']);
if (!$data)
{
    throw new http404();
}

where http404() is a custom exception that have to be processed by a global exception handler. It have to send a 404 response. Just a

header("HTTP/1.0 404 Not Found");
exit;

would be enough for Google.